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HybridZ

SR20DET electrical problems


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Okay so here's the background info. My brother and I've wired up the sr20 into a 78 280z and it ran for a while until the ignition switch fusible link went out. My brother's friend saw it was fit to just use a regular wire instead of using another fusible link...

 

And so the problem started. Now, the fuel pump doesn't turn on when the switch is on. Also the engine doesn't crank when turned to start. I've made sure the relays and ignition switch function properly, so I'm at a dead end of ideas and troubleshooting methods.

 

Please give me any advice on how to troubleshoot it, what parts may have been damaged, and let me know if you need any other info that'll help. Thanks in advance.

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  • 2 weeks later...

You have a short and may have blown the ECU with that jumper wire.

Fuses blow for a reason. Check to see if you are getting a ground signal from the ECU. Use the ECU Pinout to see which wire is the ground wire to the pump relay. You can also just turn ignition to on and then jumper the ground on the relay to the frame. If pump turns on then suspect problem with ECU. This still does not solve the first problem of why the fusible link blew.

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