What is this plug in?
 

Hey guys. Been wondering this site for quite sometime now. Decided to become a member. A lot of helpful info here. I had a question. The other day my truck just wouldn't start up after putting in a new GP relay. I just got back inside from looking for an unplugged wire somewhere and I came across a one pin female circular plug back behind the fuel filter manager. I was hoping someone could tell me what it is. Thank you. I can get pics if necessary.

get pics please it be helpfull

Here are some pictures...

Attachment 42453

sorry not sure where that plug goes when buddy next come home from work i go look at his truck he has 93

Ah alright. Thanks. Appreciate all the help I can get. I take it that it must be something just on mechanical injected 6.5's since yours must not have one?

Well i was hoping to help you but my buddy next hasn't come home yet

That's okay...can anyone help me out? Still haven't figured out what it is...

whats that next too?

It's next to the oil pressure switch.

i look at my buddy truck and he has plug just like the just tape up to wire harness

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like told you on the other forum to check the crank fuse