Honda 39794-SDA-A02 Relay Assembly, Power (Micro Iso) (Denso)

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Most of the electrical accessories including fuel injection system, horns, starter and fog lamps employ relays to control current to components where a small control circuit current controls a heavy current power circuit. Faulty component in the relay will result in the components which are being powered by the high current circuit not working. Fuses/Relays are located near the engine compartment fuse/relay box and the under-dash fuse and relay box; the engine compartment fuse/relay box is on the left side of the car behind the air filter housing. To identify a particular fuse or relay, first access it by lifting a lid and then you'll find a guide printed at the base. The under dash fuse and relay box is the kick panel on the left, you will need to remove the panel to find the relays. There are two basic types of relays: These circuits, often referred to as 'normally open' and 'five-terminal', are frequently utilized when end-users wish to control a lighting circuit using a PIR detector. Many normal-open relays exist for functions such as the accessory power socket, as well as parts of air conditioning, and they have four external spade connectors placed in a specific direction. A normally-open relay is tested by checking for continuity between terminal No. 1 and terminal No. 2 with the power supply disconnected; conversely, continuity should be obtained when terminal No. 3 is connected to the power and terminal No. 4 is grounded. Some of the relays which include the five-terminal type B relays used in functions such as daytime running and moonroof control are characterized by five terminals. Testing involves probing for continuity between terminal no 1 and 4 when power is switched off, and between terminal no 1 and 2 when power and ground are connected to terminals no 3 and 5 respectively.

A defective relay will result in improper operation of the associated component.

After removing the relay, continuity should be checked between the power circuit terminals, ensuring no continuity between terminal 30 and 87 when de-energized.

A defective relay will result in improper operation of the associated component.

The engine compartment box is located on the left side behind the air filter housing.

Unfortunately, our catalog only describes it as a main power relay. You would have to be able to match the diagram on the fuse box to the picture, and judge based off location of the relay.