I have been told by a few people i do have a check engine light and some people tell me i dont....

I have never seen the engine light on the truck at all.

So i assume i dont. Can some one walk my threw the volt meter process? I found the single plug the input i believe and the house looking thing.

I found a link with a diagram to do the test but i must be part stupid it didnt work... volt meter read 0.0 the hole time..


thanks and sorry for another stupid question

 

I just had went through the same problems you are going through trying to figure it out. Does your truck have a check engine light? If so all you need to do is ground the single wire connector or run it to the negative battery terminal and turn the key to run and wait for the ligth to start flashing

 

What year is your truck? '87 doesn't have a check engine light and maybe '88 too. This thread explains the process of checking codes: https://www.f150forum.com/f10/how-retrieve-trouble-codes-obdi-10907/

 

thanks for the link, yeah sorry mine is a 1987 with the 302

 

Your '87 doesn't have the check engine light. It has a spot for one, but the factory didn't use it and it isn't wired for it. I added it to mine so I can skip the voltmeter and just use the flashes, plus now I get an advance warning sometimes when the light flashes while I'm driving.

 

How easy would would that to do? There already is a accessory light on the dash next to the cubby hole. The light isnt used anymore so if i figured out how to wire it up would that work?

 

It's pretty easy, the hardest part was making the connector that goes into the harness because I used what I had instead of going to the junkyard. There's an actual "check engine" spot on the dash panel, it just wasn't used at the time for some reason. You add a bulb to that spot. It already has power, you just have to run the ground. You can connect the ground to the bulb on the ground side however you can or however you want, at the bulb, to the circuit board, or like I did, I added the wire into the connector that plugs into the instrument panel. Just follow the ground side of the bulb through the circuit board to the missing wire on the connector. The other end of the ground wire will go to the diagnostic connector under the hood, the spot the negative for the voltmeter hooks to. That's the white wire in my link to check codes, it runs to the check engine light bulb that I hooked up.