1984 Ford F-150 Dash lights and ECM won't talk

  • 1984 FORD F-150
  • 6 CYL
  • 4WD
  • 150,000 MILES
The lights on the dash, meaning the turn signals on the interior, check engine, etc. Lights will not work. I tried downloading the OBD I data and the computer isn't communicating with the reader. Also, the engine smells really rich. I would love to get the computer to talk to figure out what it says, but the dash lights would be really nice also.
Do you
have the same problem?
Friday, June 11th, 2010 AT 12:19 AM

1 Reply

See my profile, I am not a "paid mechanic" nor am I paid here. I am mostly a CJ Guy! I am just a member like you, trying to help you out! (I just come here a lot more often)

My Dad has a '86 T-Bird and I have done/learned how to do most of its repairs (he bought it new, rebuilt engine [once] now has almost 1/2 a millon miles.)

I really do not think the lights issue, will be read by the scanner--nor will bad injectors (controlled by the computer, not monitored) Nor will you get a "cylinder 45 misfire", or anything similar.

Had problem with surging--bad idle. Cut off. Replaced with salvage yard specials----whole throttle body, $10 (used the used injectors, 1st time to get her figured out). Replaced with new ones, when we rebuilt her.

Sometimes richness is the O2 sensors (2 on the 3.8L V-6)---found computer did not pick up on that either.I do not know what engine you have. Guessing 300 inline.

Your lights have to be FUSE---Circuit breaker---bad ground or bad connection---broke wire, maybe your solenoid is loose/corroded/ take apart and clean etc.

Are you using a scanner that you count the beeps and count the light flashes?

The Medic
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Friday, June 11th, 2010 AT 11:58 PM

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