Electrical Guru's Unite.
 

So I believe my problem is electrical and I need some thoughts as to what my problem could be. The car has had multiple electrical problems ever since Ive had it. Ive gone thru numerous ignition switches, burned the fusible wire for the ignition wire in two. And here lately the gauge for the battery stay's in the yellow but I have no problems with alternator charging or battery going dead. Not only that but when the system is put under load. For example when I have the wipers on, the speedometer needle moves drastically. It also does it when ever theirs a load on the electrical system.

All of this has probably lead up to my current problem. So I jump in the car and leave the house. Everything is running normally or as normal as it gets. I run into town and stop at one of the department stores. I shut the car down and walk in. Minutes latter Im back out of the store and get in the car. I try to start it. Nothing. Radio, lights, windows, locks, everything works except for the dash lights. They don't come on at all when the key is turned on. Not even the security light comes on.

Guys I could really use your help on this one. I'm at my wits end on this. That and the car is still sitting at the store.
BTW the car is a 95 firebird formula

Unless this is a known problem it is time to learn how to use a multimeter and start testing everything. Look at rub points to make sure wires have not been rubbed bare and start using the multimeter to test main power wires and grounds. CLEAN ALL THE GROUNDS. Make sure it is not something stupid. You can chase your tail for years in you don't start at one point, either ground or Positive batt cable and work your way all the way back to the other. Follow every main Power and ground wire. Alot of times It is fixed by the time you finish cleaning all the Pos and ground wires in the engine bay.

I had a thought. Is there any aftermarket companies that make a complete wiring harness for the engine compartment?

i would start with a load test on the cars charging system, you could also have a grounding issue. possible ground wire is shorting out and when it gets hot your loosing contact.

but this is only a suggestion and is going to take alittle time to go thru, did this just start out of no-where or did it start after something happened or was changed on the car?

Sounds like a grounding issue..

(Update)

So it looks like it was the ignition switch again. Since there wasn't any part stores open today I had to basically hot wire the thing to get it home.

I'm probably going to have to beef up the circuit and make my own ignition circuit since the stock switch tend to burn up on me. I believe I traced my largest load to the hvac circuit. Its was pulling over 26 amps when turned on the third to highest speed setting for the fan. Ill probably isolate that circuit and have it run off of a relay.

But thanks for the reply guys.

I would figure out why you are burning up the Switch first before anything..if it even is that circuit with the HVAC.