After turn on lights EPC lights came o dash board and Fault code stored in ecm (17069 Ecm Power Relay Control circuit (j271): open ) and throttle stopped working then have to switch off the lights and ignition off and on start car every thing normal until turn on headlights or parking lights check all fues change fuel injector power relay repair headlight wiring
Have you test relay it could stock open after some electrical load
change relay check wiring for shorts
Testimonial: "already check fuel injector relay but i dont know where is EcM relay location if some body have ECM relay location kindly let me know Thanks"
SOURCE: 4 Faults detected on engine diagnostics check
Try first unplugging battery cable for ten minutuse, to reset ECM, and do a scan again, there are too many unrelated error codes at the same time
SOURCE: 1991 pontiac 2.5 tech 4 fuel pump relay wont energize
Look for a bad fuse or relay. If both check out, most likely an ECM problem
SOURCE: My 1994 suburban engine stops. No fuel, no MIL light.
I checked all of the fuseable links and they were all good. Next I decided to check all the power wires to the ECM and also the grounds from a wiring diagram because the Mil is controlled by the ecm and the bulb was good. The ecm is located behind the glove box. Bingo, the orange wire was only reading 3-5 volts at the ECM, but 12.5 volts after the fuseable link at the underhood fuse block (passenger side firewall). I ran a temp wire directly from after the fuseable link to the orange wire at the ecm and the ecm turned back on and the Mil or "check engine soon" light came on too. The truck started up and has never run smoother.
Note that at first the truck just stalled out and I could restart it right away with no error codes. Eventually the stalling became more frequent with longer reset times required. Once it threw a "code 54" and I thought it was fuel related as each time the gas stopped and I could still start the truck with gas poured into the TB. Ignition ok. My fuel pump turned on and ran if I tested it. I even checked the pressure regulator and the fuel filter to no avail.The orange wire that powers up the ecm is technically part or the fuel pump relay circuit as it also feeds the fuel pump relay 12.5 volts all the time. The thin orange wire from the fuse block is joined to two other thin orange wires in the large group of wires that heads to the ecm along the firewall behind the engine. I had to dig it out of the many wires to find it and remove a lot of tape. It is amazing to me that this one little orange wire could cause so much grief and be so hard to track down. I could not have afforded to take this problem to the Dealer.
SOURCE: 1983 buick skyhawk 2.0 with TBI not sparying fuel
change the crank sensor.No the ECM has no internal oil components
SOURCE: 1989 ciera orange wire going
You didn't post an engine size but you are correct in thinking there is a fusible link that blew when you grounded the orange wire but there is also an inline fuse that protects the oil pressure switch and the fuel pump relay. It is usually located on the firewall.
You can check the fusible links near the starter for continuity. If one of them is burnt up start there by replacing it. If none of them are bad you will need to find the inline fuse. At least the 3.3 liter engine is set up this way.
I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa
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