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Old 02-14-2010, 07:13 AM
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1987 Chevy Truck ignition Problem???

I was wandering if anyone was familiar with this truck's ignition wiring. Started the truck and moved it and then was getting ready to leave work and have no power to anything controlled through the ignition. I put another switch in and still nothing. Any help would be greatly appreciated.
Thanks,

Gary

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Old 02-14-2010, 09:09 AM
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The main power junction is on the firewall, right next to the power brake booster. There is a fusible link there in the wire that runs straight down, but I think if you lose that link you also lose the lights (not just the ignition).

When you completely lose power, its sometimes because wires are loose where they connect to the large lug on the starter.

Bruce
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Old 02-14-2010, 10:22 AM
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There are generally two links, one powers ignition stuff, and one lights. I'm betting you have a burnt fusible link.
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Old 02-14-2010, 11:20 AM
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Thanks guys I will Check for the fusible links and see if that helps and will keep you posted, I still have power to the headlights and tail lights just not getting power to the turn signals, or any of the accessories controled by the ignition (ie. insturment warning lights and gauges) and all wires on the starter were tight
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Old 02-14-2010, 11:26 AM
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Many times, the links will burn or separate with no external evidence. Try tugging on the plastic "barrels", the link wire is actually between them and the starter, if they "stretch", they are burnt,
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Old 02-14-2010, 05:48 PM
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Thanks Guys, I got it running the wire from the starter to the ignition had two fusible links in the same wire and they were both bad so replaced the wire and started right up.
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Old 02-21-2010, 12:19 AM
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fuseable links on GM starters is always the first thing to check.

they like to burn up and you cant tell by looking at them

ign switches are not something that burns out in these older trucks or in the old GM cars either.,

an ignition module failing is far more common than anything else other than fuseable links burning up
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Old 02-21-2010, 08:03 AM
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Quote:
Originally Posted by gizz436
Thanks Guys, I got it running the wire from the starter to the ignition had two fusible links in the same wire and they were both bad so replaced the wire and started right up.
I hope you're still looking at this thread- you have to keep fusible links in the circuit to have continued protection from burning up the wiring loom- or the entire vehicle, for that matter.

Just replacing the wire w/a straight piece of wire is asking for trouble. There an problem somewhere causing the fusible link to melt in the first place (or someone made a mistake jumping off a dead battery, etc.) but in any event, there has to be protection for the circuit.

Good luck.
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Old 02-27-2010, 11:44 AM
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Yes I went to the parts store and bought fussible links to replace the bad ones.
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