First time posting, coming here for help, I have a 98 f150 4x4, 4.6L 150k miles, during start up the blinker indicator lights on the dash illuminated and stayed on, when trying the blinkers they did not work, but if I shut the head lights off the blinkers do work and indicators respond normally. This is the same if I turn the fan blower on, blinkers don't work and indictors stay illuminated. Also I have found that the power windows, and 4wd no longer work. other functions work such as power mirror, radio etc. all fuses under the dash and under the hood are good, I tried switching some of the relays to see if that changed anything but with no success . took the kick panel off and inspected the grounds and all seem tight. It looks like the main battery ground is just to the body and there is one solid ground from the frame to the body under the cab. all seem tight and don't appear to be corroded. any ideas? truck starts and runs great.

 

Sounds like a bad gem module .

 

yeah that's what im hearing

 

Still sounds like a bad ground rather than a GEM module. Blinkers, flashers, and headlights don't go through the GEM module....

Did you inspect the ground studs behind BOTH kick panels (left and right) or only one side?

 

No I guess I did not. I will right now. Thanks

 

What do you want for your birthday projectsho? Sob ground was backed completely out on the passenger side. And after I pulled the gem and inspected it. Where were you an hour ago, thanks a million , now to out my dash back together

 

rooster I'm having problems with my 99 ford expedition yesterday when driving down the road the o/d light started blinking and now when you put vehicle in reverse the starter engages also tried to put vehicle in neautral an crank nit and it started the vehicle just by pulling shift down

 

If you read the above past replies, your issue is not the same.
You have a DTR issue.
The switch assembly on the side of the transmission.
The OD light flashing tells you this as well.
Good luck.

 

Your symptoms have nothing in common.

Please start your own thread in the most appropriate forum area instead of hijacking an unrelated one in the wrong section.