Electrical Problem

STAR48

MEMBER
1999 LINCOLN NAVIGATOR
V8
2WD
AUTOMATIC
120,000 MILES

I have a 1999 Navigator. The headlights quit working. The parking lights work but will not turn of with the switch unless I re-start and turn off while engine is running. All the fuse's are good and the bulbs were replaced.

Monday, January 17th, 2011 AT 4:16 AM

5 Replies

KHLOW2008

MECHANIC
41,815 POSTS

For the parking light, there are 3 things that can cause it :

1. Faulty light switch.
2. Faulty parklamp relay.
3. Autolamp control module is not cutting off when ignition is turned off.

When problem occurs, to test if it is the switch, disconnect switch connector and if light stays on, it is not due to the switch.
Unplug the parklamp relay and connect a test lamp across either Tan/White and Light Green/Yellow wire and if test lamp lights up, the Autolamp Module is at fault.

Is vehicle equipped with Daytime Running Lights?

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Wednesday, September 20th, 2017 AT 2:14 PM

STAR48

MEMBER
3 POSTS

I can not see the wires and I do not have a schematic to show me what color wire is for the plugs position.

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Wednesday, September 20th, 2017 AT 2:14 PM

KHLOW2008

MECHANIC
41,815 POSTS

Is vehicle equipped with DRL? I needed it to get the correct wiring schematic.

You need to get underdash and and possibly requires removal of the steering column and underdash covers to get to the wires.

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Wednesday, September 20th, 2017 AT 2:14 PM

STAR48

MEMBER
3 POSTS

No it does not have DRL.

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Wednesday, September 20th, 2017 AT 2:14 PM

KHLOW2008

MECHANIC
41,815 POSTS

Here are 2 different schematics, one with autolamps and the other without.

If it is without autolamps, the most likely fault would be a bad light switch.

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