main relay location 3.0 csi?

[mikemls]

I am in the proces of reviving my 1972 3.0 csi. It seems that I am not getting power to the ecu. After looking over the wiring diagrams, it looks like i need to track down the main relay. Could anyone please tell me where it is located on this car?
Thanks in advance...

 

[Tundra]

Not sure if this will solve your problem. A while back my 72 0.cs would not start. Solved issue by replacing relay located in engine bay attached to firewall slightly to the right of brake booster.

 

[30csl]

Yes, this is where the main relay is i believe. The fuel pump relay is next to the ECU brain itself i think. Sorry to be vague!

 

[mikemls]

Thanks for the replies.
I was able to locate the fuel pump relay by the ecu.
I have two relays hanging loose on teh firewall above my brake booster, so I'll check those out.

 

[Vbigdog]

I've recently sorted some electrical issues with relays. A 12v DC power supply was useful in troubleshooting to energize relays. I had a good continuity check of the relay coil, a good Normaly open
of the normally open (NO) contact, but fried contact in the energized closed contact. Sometimes it helps to independently energize the coil when troubleshooting.

$0.02

 

[61porsche]

booster