1990 Ford F150 Truck won't shut off

1990 FORD F-150
170,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
BENCHR
  • MEMBER
  • 3 POSTS
Hello,
I have a 1990 F150 and for the past few days it seemed like once I turned the key it hesitated a second before starting, or I had to turn the key a little bit further than usual. Today I started it fine but then it wouldn't turn off. I turn the key back and can even remove it, but the truck stays running. I bought and installed a new lock cylinder but that didn't make a difference. Help please.
Dec 1, 2008 at 7:26 AM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Could be that the ignition switch power feed is touching the ignition circuit contact intermittently in the igniton switch or the wires itself
Dec 1, 2008 at 7:34 AM
Avatar
BENCHR
  • MEMBER
  • 3 POSTS
Ok, but how do I check that or fix it?
Dec 1, 2008 at 8:51 AM
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Sir-if you're not competent in electrical and the use of a DVOM your best bet is to have a professional check it -it can be complicated and also you might end up making things worst if a mistake happens-
Dec 1, 2008 at 9:34 AM
Avatar
BENCHR
  • MEMBER
  • 3 POSTS
That's unfortunate. I'm trying to sell the truck and I really don't want to put any more money into it. Thanks
Dec 1, 2008 at 9:47 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle