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Electrical problem on a mustang

I’m helping my brother-in law W/his 88’ mustang lx he has no blinkers or fan/blower while car is running but if you put the car on acc or run position w/car off they work, the second you try and start the car they both turn off and stay off my father-in-law feels it might be the ignition switch I’m feeling possibly a fuseable link. Either way I don’t know where to start. One more thing my brother-in-law stated this started after he jumped someone that’s why I was feeling a fuseable link.
Thank you for any help in advance.

Electrical problem on a mustang

Reply #1 –
Your father-in-law is correct. It's the ignition switch. Disconnect the battery and leave it disconnected until you replace it. The car is a ticking time bomb right now...
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Electrical problem on a mustang

Reply #2 –
Quote from: Thunder Chicken;155093
Your father-in-law is correct. It's the ignition switch. Disconnect the battery and leave it disconnected until you replace it. The car is a ticking time bomb right now...


You can’t have been more right, not only when I changed it did it fix the problem but it was toast and the wiring harness was partially melted.
Though it was the next thing I was going to change anyway just to eliminate it. I’m still very impressed how you hit that on the money thankyou and I owe you one.

Electrical problem on a mustang

Reply #3 –
I was speaking from experience. One (slightly) burned T-Bird, two broken-down T-Birds, and a broken down Cougar :hick:
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣