73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Electrical => Topic started by: kota4bye on February 02, 2013, 11:18:52 pm
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Help. Sorry to make first post like this, truck is an 87 k5. I need to have this thing running like yesterday.
Truck ran and died as I was parking it.
Now I have none of the stuff in the title. It will crank, but the fuel pump is not running when I turn the truck to run. Jump the relay and pump runs.
So I know that the problem for starting the truck is getting power from ECM to the relay, but I seem to have no power anywehre.
All the fuses are good. I've replaced or bypassed all the fusible links....
Replaced the ignition control module.
There was an alarm, I removed it. The crazy thing was that when I was messing with that, it did go into alarm mode, and triggered the hazards while I had the truck in run, I could hear the fuel pump priming each time the hazards and headlights flashed....cant make that happen now though.
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Welcome to the site from California.
Check/inspect connections through the bulkhead connector in the driver side firewall.
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What do you mean you bypassed your fusible links? That's a big mistake#1. Go back and add the proper circuit protection then recheck the ecm fuses. Get rid of all of that alarm crap and rewire it accordingly then follow diagnostic flowchart A-1.
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If you search cranks but will not run you will find similar posts as well
http://forum.73-87chevytrucks.com/smforum/index.php/topic,17537.msg140069.html#msg140069