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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 06-25-2013, 06:30 PM   #1
AAX86
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Default Weird Electrical Problems

For the past couple months my car's been having a retarded amount of electrical issues. It's starting to **** me off cause i can't figure out what's wrong.

My gauges (excluding tach and speedo), hatch and gas door release buttons, and windshield wipers are all screwing up on me. They only work when i first start the engine. When i turn the ignition on, none of them work. When i start the engine, all gauges and wipers and buttons start working fine. Then when i start driving, everything stops working again. Water temp, gas, and oil pressure all go to 0 and stay there. Wipers won't even click, and hatch release stops working. I have to turn the engine off, then on again for everything to start working again. Then once i start driving at all, they all stop working again. If i sit at idle everything works fine. They only stop working once i start moving.

My stereo, A/C, gauge lights, clock, warning lights, blinkers, etc everything else still work just fine. Just the stuff i listed above aren't working right.

What's going on? I checked the grounds on the back of the block and the one on the driver's side firewall. What should i try?
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Old 06-25-2013, 07:31 PM   #2
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Did you do any work to the car at all prior to this starting? ANY work, even if it wasn't electric?
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Old 06-25-2013, 08:02 PM   #3
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Did you do any work to the car at all prior to this starting? ANY work, even if it wasn't electric?
Well, not immediately before but i recently changed my head gaskets, fixed my brake light, and had a problem with my headlights not working unless i used my brights. I ended up just keeping my brights on all the time and changing the high beam lenses to low beams and so i wouldn't blind other people. Lazy solution, i know, but i'm so sick of dealing with a new problem every week with this car. That headlight problem could be related. i don't know.

Why though?
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Old 06-25-2013, 10:59 PM   #4
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Ignition switch
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Old 06-26-2013, 04:08 AM   #5
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Ignition switch
But the engine still starts with the key. Wouldn't it not even start if the ignition switch was bad? ...actually now that i think about it, it's been cranking real slow sometimes lately... sometimes it cranks like normal, but real slow most of the time. Maybe the ignition switch is going bad
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Old 06-26-2013, 07:47 AM   #6
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I agree it is probably the ignition switch, or the wiring to it in the steering column. A lot of components are ‘allowed’ to get power based on the position of the ignition switch. However, also have the battery checked. A bad ignition switch would not cause a slow crank problem. A low or bad battery would. Check the voltage on it. It should be between 12.4 & 12.8 with the car off. If not, charge it and then try again. It would also be a good idea to take it to your local auto parts store and have them load test the battery & test the alternator. If either is bad strange electrical problems often happen.

Good luck...
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Old 06-26-2013, 11:04 AM   #7
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I was having similar issues on my 85 a few years ago. Some stuff would only work if the key was held in a certain spot. I changed the switch and all worked fine
The old one actually fell apart when I took of the column cover. Just to be clear we're talking about the switch itself not the lock cylinder.
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Old 06-27-2013, 01:14 PM   #8
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Please keep us informed on this as to what fixes it.....Sounds annoying as hell to me.
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Old 06-28-2013, 01:19 PM   #9
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I haven't been able to pick up a new ignition switch yet. Been messing with a bike i got about a week ago. I'll update when i get the new switch in.
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Old 06-28-2013, 03:42 PM   #10
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I haven't been able to pick up a new ignition switch yet. Been messing with a bike i got about a week ago. I'll update when i get the new switch in.
you do realize they are refering to the electrical portion on top of the column and not the key/lock and tumblar................
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Old 06-28-2013, 03:42 PM
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