Anyone know where I can get an ECU Diagnostic Harness? I've been looking online and it is not easy to find. Thanks...

If you look on the side of the Ecu unit theres a small glass, Theres a small bulp behind it and it will flashes code when you turn the key on. Will flash if theres a fault with it.

Originally posted by abc@Sep 1 2005, 12:30 AM
If you look on the side of the Ecu unit theres a small glass, Theres a small bulp behind it and it will flashes code when you turn the key on. Will flash if theres a fault with it.
430201


Thanks for the reply abc. I am aware of the LED fault indicator. At the moment the fuel pump doesn't kick on and no LED at all. I think there is a relay problem and the diagnostic harness may help me troubleshoot.

Thanks,
buckdozer

Did you try a new battery? The old EFI systems are extremely sensitive to battery condition. You can fully charge and have a good test on last years battery and the thing will still not work until you put a brand new battery in. That should be always one of the first things tried when these sleds will not start, or are running poorly.

Originally posted by buckdozer@Sep 1 2005, 08:21 AM
Thanks for the reply abc. I am aware of the LED fault indicator. At the moment the fuel pump doesn't kick on and no LED at all. I think there is a relay problem and the diagnostic harness may help me troubleshoot.

Thanks,
buckdozer
430225



My 94 EXT doesn't have a working light, though that may be due to the aftermarket chip. But, last season my fuel pump would not come on...I ended up replacing it with one from my Subaru and realized afterwards that the reason the pump wasn't working is cause it was gunked up with nasty gas. Sprayed it out with carb cleaner and worked great all season. I'd check that.