Relay Id.

[jimoshel]

Can anyone identify these relays? Located on the right hand fender well. I can't find sh*t on them in my FSM, Haynes or Chilton manuals. 1987 MJ. 4.0. 5 speed.

Drove the truck yesterday. Ran fine. Went out this AM and it wouldn't start. Been messing with it all day. Got gas. Got spark. Weak but a spark at the plugs. It tries but just won't go. :dunno:

[Akula69]

From left to right:

 

O2 sensor relay

Fuel Pump relay

B+ Latch relay

A/C relay

 

but you know the drill Jim - try unplugging and re-plugging the CPS...it might be that.... :hmm:

[jimoshel]

Yep. That was the second thing I did. I think I'm going to wind up swapping out the entire engine bay wiring harness. Ain't seen so many corroded plugs, connectors, terminals in my life. And tnx for the info.

[onlyinajeep726]

From left to right:

 

O2 sensor relay

Fuel Pump relay

B+ Latch relay

A/C relay

 

but you know the drill Jim - try unplugging and re-plugging the CPS...it might be that.... :hmm:

 

You know, it's the opposite order for me on my '88 XJ...  The A/C relay is all the way on the left in mine and the O₂ is the far right... Same with my '90 XJ donor.  What's up with that?

 

Edit - Like so:

[Akula69]

Yeah, my 88 and 89 MJ are the same as your diagram, but (for some odd reason) Alldata shows it reversed for 87.

 

From left to right:

 

O2 sensor relay

Fuel Pump relay

B+ Latch relay

A/C relay

 

but you know the drill Jim - try unplugging and re-plugging the CPS...it might be that.... :hmm:

 

You know, it's the opposite order for me on my '88 XJ...  The A/C relay is all the way on the left in mine and the O₂ is the far right... Same with my '90 XJ donor.  What's up with that?

 

Edit - Like so: