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  Topic Review (Newest First)
05-30-2021 09:32 AM
jeep_boy02
Quote:
Originally Posted by Tundra-Honky View Post
Where did you get that amazing colored wiring schematic
Here's a place that sells them laminated. I ordered one year's ago, not sure if it was from here but its laminated also and is great.

You can Google "jeep cj wiring diagram" and pull up pics of same thing and print your own on a 11x17 and they come out fine usually.

https://colorwiringdiagrams.com/t/cj5--cj7

Sent from my SM-A015A using Tapatalk
05-30-2021 09:14 AM
Tundra-Honky Where did you get that amazing colored wiring schematic
05-15-2021 05:57 PM
JProctor
Quote:
Originally Posted by texasdave View Post
Unless you are 2 ft tall an weigh 25 lbs and can wiggle through a key hole I recommend moving the dash. What I do is get a length of threaded rod and put a length of 6-8 inches and screw them into dash bolt holes on the top left and right corners. Now you can suspend the dash on the two rods and begin trouble shooting. On the back of the dash there are orange (4) and black (4) wires daisy chained. These power the dash lights for each component i.e. wiper switch, heater sw, headlight sw etc. You will need a multimeter. Check the voltage going into the light with headlight switch on. You get voltage then your lights are bad. You can order a set of replacements from the different vendors Quadratrac, Morris Ros etc. Your panel instrument lights will have a single orange wire going to the bulb. The light is grounded through speedometer casing. Let me know if this helps or works then we can start on the other stuff.
Finally got some time and got around to this, checked the bulbs and they do work, no voltage through the wires though. The fuse is intact, and the headlights still work as always. I did discover an orange wire in the vicinity of the light switch box. I do not see any loose orange wires under the dash, just the one near the switch, has some kind of connector on it. Dome light also didn’t work if that information is relevant. Any further advice would be appreciated.
04-26-2021 01:56 PM
JProctor
Quote:
Originally Posted by JEEPFELLER View Post
Negative,

Not grounds destroying themselves.

The true "Jeep Juice" problem is

Personnel, messing with what they should not mess with, usually performing self taught trial and error,

Jeep electrical, but never "earning" that trial and error 'lectric certificate. Usually, inherited by the next same kind of guy.

Mostly this began (I'm guessing) 5-7 years after the new-ness wore off of the Jeep---the practice still is performed to this day, it's now exponentially out of hand.

----JEEPFELLER
If you’d like any idea just how bad the electrical system is, the previous owner somehow managed to pull off an ECU delete. Exciting stuff.
04-26-2021 01:54 PM
JProctor
Quote:
Originally Posted by John Strenk View Post
Does the fuel gauge work? Accurately?
Yes it works fine, as well as the speedometer.
04-26-2021 11:45 AM
John Strenk That would fall under the Previous Owner Opportunity Probability. or P. O. O. P.

or something like that.
04-26-2021 11:39 AM
JEEPFELLER Negative,

Not grounds destroying themselves.

The true "Jeep Juice" problem is

Personnel, messing with what they should not mess with, usually performing self taught trial and error,

Jeep electrical, but never "earning" that trial and error 'lectric certificate. Usually, inherited by the next same kind of guy.

Mostly this began (I'm guessing) 5-7 years after the new-ness wore off of the Jeep---the practice still is performed to this day, it's now exponentially out of hand.

----JEEPFELLER
04-26-2021 08:01 AM
torkman1983 Before doing anything, run a dedicated ground from battery neg to a clean location on the back or bottom of the dash. May not fix your issues, but faulty grounds account for the majority of elec problems.
04-26-2021 03:56 AM
John Strenk Does the fuel gauge work? Accurately?
04-25-2021 11:04 PM
BagusJeep Temp gauge reading low could be a missing thermostat, poorly reading gauge or sensor or a bad connection or low voltage at the meter. The temp gauge when working needs a good connection to the sensor, it reads highest with no resistance.

I would check the coolant temperature at the thermostat housing before assuming the gauge is wrong.
04-25-2021 08:53 PM
JEEPFELLER See post 5 in here https://www.jeepforum.com/forum/f8/2...ormal-4424389/

My temp is normal w/ 195 degree stat---"Normal" is when it reaches the green line on the face.

Instrument lighting???

Cluster?

Rectangles beside the cable knobs?

Any of them working?

Here's a 1979 full diagram----much of it has not changed, especially the illumination

2nd diagram (right side of entire diagram)----nearer to the top, just below Reference #s "7" and "8" is the dash illumination.

It's so much EZer to have the office store blow up big and laminate your Correct diagram--tracing is then a cinch! It's there for the future!

-----JEEPFELLER
04-25-2021 05:41 PM
texasdave
Electrical Issue

Unless you are 2 ft tall an weigh 25 lbs and can wiggle through a key hole I recommend moving the dash. What I do is get a length of threaded rod and put a length of 6-8 inches and screw them into dash bolt holes on the top left and right corners. Now you can suspend the dash on the two rods and begin trouble shooting. On the back of the dash there are orange (4) and black (4) wires daisy chained. These power the dash lights for each component i.e. wiper switch, heater sw, headlight sw etc. You will need a multimeter. Check the voltage going into the light with headlight switch on. You get voltage then your lights are bad. You can order a set of replacements from the different vendors Quadratrac, Morris Ros etc. Your panel instrument lights will have a single orange wire going to the bulb. The light is grounded through speedometer casing. Let me know if this helps or works then we can start on the other stuff.
04-25-2021 01:13 PM
JProctor
Instrument electrical issues - 84 cj7

Not sure where to begin with this one but I have 2 main issues with the instruments:

1) Temp gauge “works”, but it doesn’t go much higher than cold. Oil Pressure gauge is very low once the vehicle gets to temp. May be an actual oil issue, but I would prefer to check for any potential electrical issues since the wiring is an absolute mess.

2) None of the instrument lights work. No idea why. Every gauge has at least some amount of functionality, but none of the lights work. Headlights, taillights, signals all work fine but I can’t see the speedometer at night, not that this thing is a speed demon, but it is slightly annoying.

Any tests or suggestions would be greatly appreciated. I am in possession of an owners manual from an older model cj7, but I can’t read wiring diagrams very proficiently so i didn’t get very far with that.

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