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I have three connectors in my 1989 F-150 5.0 L V8 Custom that are not hooked up to anything. Since it's a base model I'm assuming those would be for options I don't have, but I'd just like to make sure everything's right and I can leave those disconnected.
See attached pictures. Can anyone help me identify what these are for?
The first two come off the wiring harness behind the air box coming from the PCM. The last one comes off the wiring harness where the fuel injectors are on as well and is roughly im the distributor area.
Picture 1) Data link connector for retrieving codes from the ECM/ PCM.
Picture 2) Is that at the end of long lead from the main harness? It could be to the power steering pressure switch which not all trucks had. On second thought, it appears to be close to the main harness. You do not have air conditioning so that would have been for the compressor clutch.
Thanks for the quick answer! Both connectors on picture 1 are for that purpose? There is a smaller grey one too.
For picture 2, it is off the end of the same harness that the fuel injectors are on, and the coolant temp sensors, etc. Close to that. I can rule out it being for the power steering pressure switch, since my truck actually came with that and it's properly hooked up at the power steering fluid line by the power steering gearbox. Could definitely be for the AC compressor clutch though, since you are right, I do not have that.
It at least doesn't seem like it should be hooked up to anything important that it is not from your answer!
