lastbrunneng Posted October 4, 2009 Share Posted October 4, 2009 Hello, I have a major voltage drop occurring, it started after my thermostat housing came loose and sprayed water while I was driving. The voltage drop only occurs with the key turned to On or Start, Acc or Off causes no drop. Because of the placement of the leak, I suspect I have either a corroded connection/wire or short near the front of the engine. My first instinct was the water temp sensor, but unplugging didn't help. I traced the voltage drop to the C5 connector on the junction block, the bottom flat connector. With that terminal unplugged I used a jumper wire to test each connection and immediately on connecting the bottom flat terminal I saw the voltage drop from 12 to 8. There is a white wire with a red stripe leading to this connection, can anyone tell me where this wire goes? I've studied the wiring diagrams but I'm not very good at it, I believe it goes through the C3 terminal as well before running through the ignition switch and possibly the ignition relay, but I lose it from there. Any help would be greatly appreciated. Kai Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted October 7, 2009 Share Posted October 7, 2009 White with red stripe was 'on with ignition' wires on my car. I don't know the connector codes, sorry. Coolant getting into a connector with do all sorts of fun things. I'd inspect them closely. You will probably have to disassemble the connectors to get at the pins and clean them well enough. Quote Link to comment Share on other sites More sharing options...
lastbrunneng Posted October 8, 2009 Author Share Posted October 8, 2009 I followed the wire to the fusible link marked 'ignition,' and determined that the circuit ends at the water temp sensor, cold start injector, and some things I haven't identified yet. But disconnecting all those things failed to remedy the voltage drop, so I suspect the problem to be further back the line. Quote Link to comment Share on other sites More sharing options...
Nigel Posted October 8, 2009 Share Posted October 8, 2009 It might help if you tell us what Z you have first. Looking at a wiring diagram for a '71 240Z is going to be pretty useless if troubleshooting a '87 300ZX... Nigel '73 240ZT Quote Link to comment Share on other sites More sharing options...
lastbrunneng Posted October 8, 2009 Author Share Posted October 8, 2009 Whoops, of course, its a 76 280z, all stock. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.