help with wiring a B&M trans temp gauge.

[zebvance]

I am hooking up a B&M Trans temp gauge and a after market trans cooler.

It says to hook up one wire to illumination/ dashboard lights but I have not Idea which wire to splice into. Also It says to run one wire to the ignition wire, once again I have no idea where this is located. Sow help would be greatly appreciated!

The vehicle is a 1988 Comanche 4.0 4x4 auto shortbed.

Below is a picture of the wiring diagram.

 

[whitexj98]

On my 98 I went to the fuse panel and put it under the fuse for the interior lights (on the non hot side). I didn't want to pull the panel out and splice in. It has worked perfectley for the last 2 years.

For the ignition I found a wire that was hot while running using a test light and spliced in. I honestley am not 100% sure what it goes to but I fgured if I blew a fuse I would find what I spliced into. That gauge does not pull much amperage, I have no problems with my "ignition wire".

You just need to find a hot when vehicle on wire and a wire that is ran to interior lights and splice in.

 

[CaliXJ]

how did you hook to trans cooler? Inline sensor?

 

[hubs97xj]

Do the MJ and XJ use the same fuse blocks?

http://www.lunghd.com/Tech_Articles/Electrical/1984_thru_1988_Fuse_Identification.htm

I use fuse holders like this to add circuits. Easy, doesn't muck up the factory wiring.

http://www1.cooperbussmann.com/images/3c2dce34-cf0b-43a1-aabf-d886ccd13aad.JPG

 

[xjtrailrider]

For the gauge light I just hooked it up to be on when the key is on, It helps to have the gauge lit even during the day in my opinion

 

[whitexj98]

Do the MJ and XJ use the same fuse blocks?

I use fuse holders like this to add circuits. Easy, doesn't muck up the factory wiring.

http://www1.cooperbussmann.com/images/3c2dce34-cf0b-43a1-aabf-d886ccd13aad.JPG

That is awesome; I didn't know such thing existed!