How do Relays Function and Undergo Testing on an Acura MDX?

These cars have a number of electrical add-ons, such as fuel injection system, horns, starter and fog lamps, which are controlled by relays that ensure transmission of electric signals to the respective components. By allowing low-current control circuit to open and close high-current power circuit relays function. These relays can be found in the engine compartment fuse/relay box and near the fuse and relay boxes under the dashboard. There are usually three main types: normally-open type-A , normally-open type-B, and five-terminal type ones. The internal circuitry is similar on Type A and Type B relays while they differ in external spade terminal arrangement and numbering. Compared to Type A or Type B relays, five-terminal relays have different internal circuitry plus an added external spade terminal. To test a relay it must be removed from the vehicle and an ohmmeter used to check for continuity. Normally open Type A relays for instance which are used for various purposes such as air conditioning; horns; window lifters have four external spade terminals arranged in two rows. When you unplug them from power sources you should make sure there is no connection between terminals No1 &No2 on one hand but also that there is between terminal No 3 connected to power source via (terminal No 4) a ground wire respectively.The normally-open Type B ones similarly have four external parallel rows of spade terminals just like their counterparts above mentioned for example blower motors; rear defoggers . For these B-type testing is simple which requires breaking connection between contact points No1&No3 when current ceases to flow through them whereas creating path between contacts No1&No3 using their corresponding feeds wires from connectors No2&No4 which are connected with interfaced power line as well as grounded with earth respectively.A last category we will take care about here is five-terminal devices known for moonroof control ; high beam cut-off and others need us to examine continuity between point No 1 &No 4 without power supply whereas later on it should be established by joining terminal No. 3 to power and the ground respectively provided that connection has been completed at points No2&No5. These relay switches are normally discarded as they cannot be repaired.

Genuine Acura MDX Relay

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25 Relays found

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Acura MDX Power Relay Assembly (Micro Iso) (Mitsuba)
Part Number: 39794-SDA-A05
$22.56 MSRP: $32.22
You Save: $9.66 (30%)
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Product Specifications
- Other Name: Relay Assembly, Power (Micro Iso) (Mitsuba) ; Horn Relay; Horn Relay, Relay
- Replaces: 39794-SDA-A01, 39794-SDA-A04
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Power Relay Assembly
Part Number: 39794-SDA-A03
$22.56 MSRP: $32.22
You Save: $9.66 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: HVAC Blower Motor Relay; Power Relay, Relay
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Fuel Pump Relay Assembly (Denso)
Part Number: 39794-SDA-004
$51.46 MSRP: $73.50
You Save: $22.04 (30%)
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Product Specifications
- Other Name: Relay Assembly, Fuel Pump (Denso); Fuel Pump Relay, Relay
- Replaces: 39794-SDA-003, 39794-SDA-305
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Engine Control Module Relay Assembly
Part Number: 39794-SDA-902
$67.80 MSRP: $96.83
You Save: $29.03 (30%)
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Product Specifications
- Other Name: Engine Control Module; ECM Relay, Relay
- Replaces: 39794-SDA-901
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Power Relay Assembly (Micro Iso) (Denso)
Part Number: 39794-SDA-A02
$31.29 MSRP: $43.64
You Save: $12.35 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay Assembly, Power (Micro Iso) (Denso)
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Powertrain Control Module Relay Assembly (4P) (Mitsuba)
Part Number: 39794-S5A-901
$46.78 MSRP: $65.25
You Save: $18.47 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay Assembly, Engine Control Module (4P) (Mitsuba)
- Replaces: 39794-S5A-902
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Power Relay Assembly (5P) (Micro Iso) (Mitsuba)
Part Number: 39794-S10-003
$49.32 MSRP: $68.78
You Save: $19.46 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay Assembly, Power (5P) (Micro Iso) (Mitsuba); Relay
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Turn Signal And Hazard Relay Assembly
Part Number: 38300-SDB-A03
$29.50 MSRP: $41.15
You Save: $11.65 (29%)
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Product Specifications
- Other Name: Turn Signal And Hazard; Flasher, Relay
- Replaces: 38300-SDA-A03
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Main Relay Assembly (Mitsuba)
Part Number: 39400-S84-003
$100.49 MSRP: $143.51
You Save: $43.02 (30%)
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Product Specifications
- Other Name: Relay Assembly, Main (Mitsuba); ECM Relay, Relay Assembly
- Replaces: 39400-S84-A01, 39400-S82-A01
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Relay Assembly (Micro Iso)
Part Number: 39792-SDA-A01
$4.62 MSRP: $6.44
You Save: $1.82 (29%)
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Product Specifications
- Other Name: Relay
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Fuel Pump Relay (5P) (Mitsuba)
Part Number: 39794-S5A-003
$45.76 MSRP: $63.82
You Save: $18.06 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay Assembly, Fuel Pump (5P) (Mitsuba)
- Replaces: 39794-S5A-004
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Cooling Fan Motor Relay (Micro Iso) (Omron)
Part Number: 39792-SJC-A01
$9.00 MSRP: $12.55
You Save: $3.55 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay Assembly, Power (Micro Iso) (Omron); Relay
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Relay Assembly, Power
Part Number: 39794-T5A-J01
$39.57 MSRP: $55.18
You Save: $15.61 (29%)
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Product Specifications
- Other Name: Relay
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Turn Signal And Hazard Relay Assembly (Mitsuba)
Part Number: 38300-SHJ-A04
$85.23 MSRP: $119.57
You Save: $34.34 (29%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Relay Assembly, Turn Signal And Hazard (Mitsuba) ; Turn Signal & Hazard Flasher; Flasher, Turn Signal & Hazard Flasher
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Relay Assembly
Part Number: 39794-T7A-901
$5.20 MSRP: $7.24
You Save: $2.04 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Relay Assembly, Power (4P) (056700-7410) (Denso)
Part Number: 39792-SE0-003
$70.12 MSRP: $97.80
You Save: $27.68 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 39792-SM1-A01, 39792-SE0-004, 39792-SP0-004
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Relay Assembly, Turn Signal And Hazard (Trico)
Part Number: 38300-S9V-A01
$83.52 MSRP: $117.17
You Save: $33.65 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Turn Signal & Hazard Flasher
- Replaced by: 38300-S9A-003
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Relay Assembly, Power (Micro Iso)
Part Number: 39794-TBA-A01
$4.53 MSRP: $6.32
You Save: $1.79 (29%)
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Product Specifications
- Other Name: Relay
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Relay Assembly, Power (4P) (Rc-2223) (Mitsuba)
Part Number: 39797-SM4-003
$77.03 MSRP: $110.02
You Save: $32.99 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura MDX Relay Assembly, Rfc
Part Number: 39795-SJK-004
$29.35 MSRP: $40.94
You Save: $11.59 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay
- Warranty: This genuine part is guaranteed by Acura's factory warranty.

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Acura MDX Relay

The Acura MDX Relay protects the climate control chain by functioning as an electrically driven switch that allows a very small signal to operate larger A/C equipment without stressing out. Within the SUV's system, this Relay can receive low power from control modules and then close or open contacts to produce high current to the fan, blower motor, or sensor circuits so that the cabin temperature information remains accurate and cabin airflow remains steady. When a Relay fails, the associated part goes off instantly and no fan or blower can alert owners long before bigger components burn out. Early MDX models were based on the classic electromechanical Relay that uses an internal electromagnet and moving contacts, although later ones can also have solid state or magnetic latching types. Electromechanical units switch quickly but their moving parts wear. Solid state versions do the same job silently with no moving parts, and latching designs maintain their position after a single pulse and have the advantage of saving energy in case of short drops in power. Across Acura production cycles, any time there are fault codes or erratic temperatures, every single Acura MDX is able to depend on the timeliness of Relay replacement, preventing a minor link from hobbling the entire A/C chain.

We provide a broad range of OEM Acura MDX Relay at unbeatable prices on our website. For your OEM parts, You can count on the guaranteed quality, manufacturer's warranty, outstanding customer service, and prompt delivery. We look forward to your visit.

Acura MDX Relay Parts Questions & Experts Answers

Relay Assembly (Micro Iso)
39792-SDA-A01
Q: How do Relays Function and Undergo Testing on an Acura MDX?
A:
These cars have a number of electrical add-ons, such as fuel injection system, Horns, starter and fog lamps, which are controlled by relays that ensure transmission of electric signals to the respective components. By allowing low-current control circuit to open and close high-current power circuit relays function. These relays can be found in the engine compartment fuse/relay box and near the fuse and relay boxes under the dashboard. There are usually three main types: normally-open type-A , normally-open type-B, and five-terminal type ones. The internal circuitry is similar on Type A and Type B relays while they differ in external spade terminal arrangement and numbering. Compared to Type A or Type B relays, five-terminal relays have different internal circuitry plus an added external spade terminal. To test a relay it must be removed from the vehicle and an ohmmeter used to check for continuity. Normally open Type A relays for instance which are used for various purposes such as air conditioning; horns; window lifters have four external spade terminals arranged in two rows. When you unplug them from power sources you should make sure there is no connection between terminals No1 &No2 on one hand but also that there is between terminal No 3 connected to power source via (terminal No 4) a ground wire respectively.The normally-open Type B ones similarly have four external parallel rows of spade terminals just like their counterparts above mentioned for example blower motors; rear defoggers . For these B-type testing is simple which requires breaking connection between contact points No1&No3 when current ceases to flow through them whereas creating path between contacts No1&No3 using their corresponding feeds wires from connectors No2&No4 which are connected with interfaced power line as well as grounded with earth respectively.A last category we will take care about here is five-terminal devices known for moonroof control ; high beam cut-off and others need us to examine continuity between point No 1 &No 4 without power supply whereas later on it should be established by joining terminal No. 3 to power and the ground respectively provided that connection has been completed at points No2&No5. These relay switches are normally discarded as they cannot be repaired.