88 s10. short in the wiring, frying coil. how do I find short?

On a vehicle that age you probably have insulation on wires that have rubbed through somewhere and are shorting to ground. Look for where the wires go through the firewall to the ECM

https://www.google.com/search?q=1994+Chevy+S10+4x4.+The+gauges+and+speedometer+keep+blowing

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Within the length of the two wires fine other end and white to white and black to black. They maybe shoved up in there somewhere. Before you hook up the wires check that the light has continuity OHMS meter at each wire end. If none the check the bulb. Then check the wires you find one should have power and one not. don't forget the button that turns it on when you open it power side passes though that switch. It is Batt power so power to the switch all the time to one side. Look for the other wires near the switch

Mike.

Go to Autozone.com and register your vehicle and get a free wiring diagram and powerbox layout. Although it sounds like you have some info.

Sounds like something dependent on the injector circuit is smoked. A bad relay, a bad fuelpump, find out which connects through the injector loop that is not connected when the injectors are out. You should be able to trace it back.

I mentioned the fuelpump because it coasts until the injectors dump fuel into the engine and runs only shortly until the pressure regulator signals a need to kick in again. Perhaps a fuel pressure regulator?

Would be interested in what you find.

I would say that the problem is going to be under the hood in the steering somewhere. Not in the steering column. Check to make sure that the tie rods are not pulling or pinching a wire.

You have spark on the coil wire but not coming from the cap. You replaced the cap right. Did you replace the rotor too. Sometimes the rotor burn in the center and the spark goes right thru it in to the distributor shaft.

What it sounds like is somewhere in the system you have a positive wire grounding out. Now that you know that comes the hard part.....finding it...I'd start with the major junctions, such as on the starter and altanator and around the distributor. Since you are frying the main fuse, it can not be a small wire, otherwise it would just fry out the small fuse at the point of contact.

Its not so common on the older silverodo's, but on late model dodge's, the starter wires works themselves loose and arks util it does the same thing.

If all your main line wires look good and all the conectors are good and tight, you can try looking through your fuse box's for other fried fuses to give you a clue as to where to look next. Unfortuately if you dont find other fried fuses, I can not tell you where to look next, you will just have to work your way through the system.


Good Luck, we will be here if you need us.

Replace the ignition module.

Check the wiring from the computer to the vehicle speed sensor for any corrosion or damage. It could be open or shorted somewhere.

did you try changing the fuel filter? it could be completely clogged

Recheck your wire harness to your trailer hook up. You may have a short in the wire. Good luck