Wiring q's for the wiring masters w/pics

[78cj5]

After the headlight problem being so easy to fix, i figured id finish up and wiring problems. I have several loose wires in my dash, also guages missing. I replaced the speedo with one that was in the jeep when i got it, but the fuel or temp were in the guage, so im assuming some of the wires go to them. It appears to be a factory harness and not wacked up, so im hoping someone knows what these wires are.





these are zip tied together in one hole



these are zip tied to the other hole



radio?




these both are labeled F

 

[78cj5]

did i even stump CJ??

 

[IOPort51]

the best I can do and these are for 1977,
I hope you have zoom.

 

[78cj5]

thank you sir!!! ive got to find my specs now so i can see

 

[Old Dog]

You might want to look through the "useful info" by Brock in the misc. section .
I think I remember John saying what color the wires are in one of his gauge topics. It's all good info and you should look through it anyway if your messing with your gauges.

 

[IOPort51]

About.com: http://www.amazon.com/exec/obidos/tg/detail/-/0801985366/qid=1083970413/sr=1-3/ref=sr_1_3__i3_xgl14/104-6350517-3745555?v=glance&s=books

this could be a good thing.

 

[fishinfool98]

I would be willing to bet the wires with f on them are for Fuel.
just a guess though
No telling what the PO was drinking when he was doing the job

 

[CJ]

Make sure ignition is off.

Using a volt meter set on DC -

Measure voltage for every loose wire. Note if 12v is present or not.

Turn key to acc. Measure again and make notes.

Turn key to run. Measure again and make notes.

Turn on head parking lamps. Measure again and make notes.

Turn on head lights. Measure again and make notes.



Set meter to OHMS.

Measure resistance to ground for every wire that DID NOT have voltage in the earlier steps. Make notes.

Any wires that are not a direct short to ground but show some resistance are usually sending units.



Start engine and as let warm up. Turn off engine.

With meter still set to OHMS measure all the wires again that DID NOT have voltage and make notes of resistance. The wire that the resistance has changed on is water temp.


Drive Jeep or drain some fuel from the tank.

Measure all wires again that DID NOT have voltage. The wire that the resistance changed on is fuel level.

 

[Jroch]

Make sure ignition is off.

Using a volt meter set on DC -

Measure voltage for every loose wire. Note if 12v is present or not.

Turn key to acc. Measure again and make notes.

Turn key to run. Measure again and make notes.

Turn on head parking lamps. Measure again and make notes.

Turn on head lights. Measure again and make notes.



Set meter to OHMS.

Measure resistance to ground for every wire that DID NOT have voltage in the earlier steps. Make notes.

Any wires that are not a direct short to ground but show some resistance are usually sending units.



Start engine and as let warm up. Turn off engine.

With meter still set to OHMS measure all the wires again that DID NOT have voltage and make notes of resistance. The wire that the resistance has changed on is water temp.


Drive Jeep or drain some fuel from the tank.

Measure all wires again that DID NOT have voltage. The wire that the resistance changed on is fuel level.

Awesome advice and directions on the Multi Meter CJ a lot of people do not know how to use this tool and are always reluctant to grab one, I live by the meter on anything electrical I work with. On a side note I had been using Flukes for years, nothing better, I recently have been using a Field Piece "it was given to me to demo" not a bad meter either little slow reading MFD's. personally I like an old analog when reading DC current and checking amps, digitals are just a little slow to give proper readings on lets say something like directionals flashers etc:

 

[killaownzu]

I have readable wiring diagrams if you would like them...just message me and I` can email

 

[killaownzu]

Heres some for the rest of you folks

Jeep CJ5 Wiring Diagram – 1978