Re: 55 patrician. New owner, dumb questions
Posted by HH56 On 2022/3/13 16:34:18
Quote:
The license plate lamps are powered by the same wire connecting to the tail light terminal on the headlight switch that powers the side courtesy lamps (on the senior models) and the tail lights.
Out of the headlight switch tail light terminal, a black wire goes into the main loom and a short black jumper wire also goes to the rheostat section of the switch to power the dash lights. A few wires exit the main loom and head to the area under the drivers side kickpanel and go thru a round plug where they mate with the body loom going to the rear of the car. Sometimes the pins or sockets in the plug oxidize or work loose so if all rear lights have issues that would be one place to look for problems. There may also be one or two individual inline connectors in that area for options or other functions.
At the Left rear corner in the trunk, the body loom splits and feeds the left tail light with another section heading to the right side by laying in a narrow trough like area at the rear of the trunk floor. Somewhere before the middle of the trough is a hole where the license light feed and gas tank sender wire exits. Under the rear bumper splash panel or in the concave part of the bumper itself is another inline connector for each wire. For the license light there may be a dual wire type inline connector with a single wire feeding each license light or the wires from the license lights could be spliced together and go into a single wire inline connector. Have seen both ways. Check that connector because moisture and oxidation can do a job on them and also check for damage to the loom in the trough or at the hole. The hole grommet could be gone letting the wire get cut or many times something has fallen down in the trough and laid against the loom where eventually the constant vibration can damage a wire.
Here is a photo of the headlight switch showing the various connections.
Attach file:
headlight sw 55-6.jpg (63.41 KB)
and my headlight switch won't light my license plate lights or IC at all, not sure what the issue is.
The license plate lamps are powered by the same wire connecting to the tail light terminal on the headlight switch that powers the side courtesy lamps (on the senior models) and the tail lights.
Out of the headlight switch tail light terminal, a black wire goes into the main loom and a short black jumper wire also goes to the rheostat section of the switch to power the dash lights. A few wires exit the main loom and head to the area under the drivers side kickpanel and go thru a round plug where they mate with the body loom going to the rear of the car. Sometimes the pins or sockets in the plug oxidize or work loose so if all rear lights have issues that would be one place to look for problems. There may also be one or two individual inline connectors in that area for options or other functions.
At the Left rear corner in the trunk, the body loom splits and feeds the left tail light with another section heading to the right side by laying in a narrow trough like area at the rear of the trunk floor. Somewhere before the middle of the trough is a hole where the license light feed and gas tank sender wire exits. Under the rear bumper splash panel or in the concave part of the bumper itself is another inline connector for each wire. For the license light there may be a dual wire type inline connector with a single wire feeding each license light or the wires from the license lights could be spliced together and go into a single wire inline connector. Have seen both ways. Check that connector because moisture and oxidation can do a job on them and also check for damage to the loom in the trough or at the hole. The hole grommet could be gone letting the wire get cut or many times something has fallen down in the trough and laid against the loom where eventually the constant vibration can damage a wire.
Here is a photo of the headlight switch showing the various connections.
Attach file:
headlight sw 55-6.jpg (63.41 KB)
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