Poor Idle Illuminated cluster lighting running lights turn signal

[tylergrant2011]

Ok I have an 87 mj 4.0. First thing first it idles very poorly and sometimes just shuts off while driving and also starts to spit and sputter when accelerating. When I turn my lights on at night the dash illuminated lights don't work. My turn signal stays solid green and doesn't blink both right and left. My running tail lights don't work. Help/suggestions would be appreviated.

[Keyav8r]

Do Cruiser's ground refresh to address the lighting issues. May also help the idle problem. Best bet, do all of his Renix tips. I think they're pinned in either Tech or DIY forums.

[cruiser54]

In my signature.

 

Do Tips 1 through 5, and consider 18 and 27. 

[tylergrant2011]

For some reason also I forgot to mention the fuse(Gauges) blows everytime I put one in when I turn the key

[cruiser54]

For some reason also I forgot to mention the fuse(Gauges) blows everytime I put one in when I turn the key

Did someone do a hack job on a radio install? 

[tylergrant2011]

Mistake it has no radio and its not the gauges fuse its parking lps

[tylergrant2011]

Also on the rough idle I noticed when I disconnect the fuel pump while it's running it idles smoothly for those few seconds kind of like its getting too much fuel/pressure.

[cruiser54]

Mistake it has no radio and its not the gauges fuse its parking lps

Have a trailer wiring plug cobbled up in the back? 

 

As for the idling better when you unplug the pump, that has bad throttle body to MAP sensor hose written all over it. 

 

Image Not Found

[tylergrant2011]

The trailer wire was grounding out under the tailgate. And do you have a write up or diagram on all thr vaccuum hoses a lot are cracked brittle and busted

[cruiser54]

The trailer wire was grounding out under the tailgate. And do you have a write up or diagram on all thr vaccuum hoses a lot are cracked brittle and busted

Figured as much. 

 

Tip 22 in my write-ups covers the vacuum lines, including part numbers, and here's a diagram for you. 

 

Image Not Found

[tylergrant2011]

Got it running smooth it was the map sensor vacuum was detached. I also noticed that my wiring for the signal, tail, parking light where cracked. Do you have a suggestion on how to tackle rewiring the whole truck because over time its gonna short out again.

[cruiser54]

Got it running smooth it was the map sensor vacuum was detached. I also noticed that my wiring for the signal, tail, parking light where cracked. Do you have a suggestion on how to tackle rewiring the whole truck because over time its gonna short out again.

That's a lot of diagrams. Can't just fix the short that's there, or just rewire the trailer plug? 

[tylergrant2011]

I just noticed tonight I thought it was a trailer wire hitting the frame it must be further up. I took my key out of the truck and closed the doors. I disconnected the plug in the back grabbed my test light stuck my ground on and probed the top left one which is a blue wire it was the only one to light up. Any more suggestions?

[tylergrant2011]

Also along with this cruiser54 on the renix tips on the 10 pin connector driver side front beside filter box the probes are sliding down in the harness and I don't think they are making a secure connection.

[cruiser54]

Also along with this cruiser54 on the renix tips on the 10 pin connector driver side front beside filter box the probes are sliding down in the harness and I don't think they are making a secure connection.

Solder and shrink tube the wires individually.

[tylergrant2011]

Start on that tomorrow thanks man!