Where is the main relay on a Honda CRX?

Main Relay Location on a Honda CRX
The main relay on a Honda CRX is usually located under the dash on the driver’s side, in or near the fuse box area. It is relatively easy to find due to its size. Here are the steps for removing the main relay from a right-hand drive 88-91 CRX, although the steps are the same for the left-hand drive model:
1. Remove the hood lever with a 10mm socket and extension bar. There are two bolts, and when removed, the lever will fall out of the way.
2. The relay will lift out, and it is fitted with a long lead, making it easy to access the connector and unplug it.
Testing the Main Relay
If you suspect that you have a bad main relay in your Honda CRX, you can perform a diagnostic test to check its functionality. Here’s how to do it:
1. Consult your owner’s manual or vehicle repair manual and remove the main relay.
2. Attach the battery positive terminal to the No. 4 terminal and the battery negative terminal to the No. 8 terminal of the main relay.
3. Check for continuity between the No. 5 terminal and No. 7 terminal of the main relay using a circuit tester or multimeter.
It’s important to note that the main relay can impact the engine’s ability to run, and if you suspect a faulty main relay, performing this test can help you determine if it needs to be replaced.
I hope this information helps you locate and potentially test the main relay on your Honda CRX!

Where is the main power relay?

Where To Find the Main Relay. You can find the main relay in your vehicle’s fuse box, which is commonly found under the passenger side dashboard or the engine bay. The fuse box cover will usually show a diagram of the box’s different fuses and relays.

What does the main relay control?

Re: what exactly does a main relay do? (
Basically it has two sets of switches inside. When you first turn the key on, you are closing one set of contacts which provides power to the ECU. In turn, the ECU then closes the second set of contacts which powers up the fuel pump.

How do I know if my power relay is bad?

Most modern relays have an LED to tell you if they are in the active state (ON). If that light is off and you’ve got control voltage to the relay or coil terminals (typically A1[line] and A2 [common]) then you can safely assume that relay is bad.

What is the Honda main relay?

The main relay in a vehicle controls the fuel pump and supplies power to the injectors. Knowing how to test a Honda main relay can help you better pinpoint the cause when an electrical issue arises.

What causes a main relay to fail?

The two most common failure mechanisms of relays are contamination and mechanical wear of the internal switching elements discussed as follows: a. Contamination is a major cause of early life failures.

How do I know if my relay is bad?

Polarity usually doesn’t matter it should click either way. If you don’t hear it click chances are your relay is bad you can try to confirm. That by checking the resistance.

Where is my relay located?

A: The ignition relay is in charge of switching power to both the ignition system and the fuel system once a vehicle’s key is turned. The ignition relay (when equipped) is typically found inside the vehicle’s fuse box. It can be located using the diagram on the fuse box cover.

How do I know if my main relay is bad?

Re: what are the symptoms if my main relay is going bad? Car won’t start after parked for just a minute. Car starts but quickly dies as the rpm shoots to 1300 rpm. Once started the car won’t stall.

Where is the main relay on a 91 Honda Civic?

The main relay is located under left side of dash its brown or gray in color not hard to get to at all but sometimes hard to get off bracket so you can just unplug old one adn plug in new and wire tie back up.

How do you know if you have a bad relay?

Most modern relays have an LED to tell you if they are in the active state (ON). If that light is off and you’ve got control voltage to the relay or coil terminals (typically A1[line] and A2 [common]) then you can safely assume that relay is bad.