Originally Posted by Hsmith
Hi there! I have a 2003 Jeep Liberty Renegade. My right tail light is out but all other lights work. The bulb is good, the socket is good, the connection is good, and the fuse is good. The problem seems to be stemming from the wiring. Somewhere in the wiring from the fuse to the bulb there is a disturbance in power. We used an ammeter and the amps at the fuse were 11 but at the bulb they were 0. Any suggestions on what could be the cause or how to fix it? Thanks!
I think you mean that volts
at the fuse were 11 volts but at the bulb were 0 volts and that you used a voltmeter.
...not trying to be a smartyass here but we need to get the basics right first.
If you look at the attached circuit diagram for the 2003 KJ....no specific mention of Renegade or not...you need to put your Multimeter on DC volts and measure at on both sides of Fuse 9 (10 A) on the Junction Block which is the internal fuse panel. This is with reference to a good ground somewhere such as a clean chassis or engine point.
You should read approx 12 volts here...11 volts is no big deal.
Then the voltage leaves the Junction Block on connector C2 Pin 26 via a Dark Green/Yellow wire. Pull this connector C2 off and re-plug it a few times in case you have a dirty connection here.
This Dark Green/yellow wire then goes through connector C306 Pin 16.....white connector, left lower B-Pillar...check this connector is clean and tight.
It then goes through connector C310 pin 11, Light Gray connector, right rear quarter panel and to pin 2 on the tail-light cluster....so you should read +12 volts here at the cluster where the Tail Light bulb plugs in....with reference to the ground connector at the cluster socket namely where the Black/White wire goes. If you do not read +12 volts here....with the lights switched ON of course...then move the ground lead of your meter to a good chassis point or the rear axle etc. If you now read +12 volts it means that the ground has gone missing to the socket but I believe on your USA model the Tail Light/ Stop Lamp share the same bulb or at least the same ground but I may be wrong here!
So you need to trace where the voltage has gone missing but common problems are the bulb, the bulb socket, the ground going to the bulb or...if you have a non-Mopar trailer package installed then a problem with the trailer package.
You can test for the presence of +12 volts all the way along the route of the Dark Green/Yellow wire by piecing the insulation of the wire at various places with a pin or sewing needle to contact the copper conductor and place the positive meter lead on the pin to check for voltage....close up the pin-hole in the insulation with some glue afterwards.