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Old 02-27-2020, 10:12 AM   #1
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Econoline Dome Light Relay

Hey - Can anyone help me out with the location of the dome light timed relay in a 2002 Econoline?

And maybe some troubleshooting help. The interior lights are acting funky. Sometimes they come one when the doors open. Sometimes not. When they do, they stay on for 2-3 seconds only. They don't work when turning the knob to the "on" position. The rear dome light does work when the 3-way switch is set to on. I am guessing its the relay. Thoughts?

Van:
2002 Econoline V10, Cargo, CCV Top, Home Build
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Old 02-27-2020, 03:18 PM   #2
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May not be a relay?!?
This is the dome light in the headliner between the front seats???
I think I have 2002 wiring manuals at home and will try to check tonight.
The front headliner dome light and the rear cargo light are wired similarly - green-yellow (continuous power) + black-blue (switched power) + black (ground). 2002 may have different wire colors?!?
Reason why I know - I just replaced the SMB headliner with a stock van headliner with dome light and had to perform some wiring modifications.
There are some black relays under the steering column a few inches behind the trim piece at the drivers knees.
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2006 E350 4x4 SMB: 6.0L-5R110-Atlas-D60-D60-yada-yada-yada
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Old 02-27-2020, 11:01 PM   #3
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*** from the 2002 wiring manual ***

so the interior lights are powered by fuse 2.4 in the central junction box - 15a and hot at all times.

the wire that is light green with yellow stripe runs to the:
1. main light switch;
2. door ajar switch front right
3. door ajar switch front left
4. side door ajar switch
5. 3rd brake light
6. door ajar switch rear
7. cargo lamps + interior lamps + vanity mirrors (sun visors)

#2 and #3 are used to illuminate the courtesy lamps during entry.
the wire that is black+light blue stripe is from the door ajar switches.

If there are light issues, I would check the connector and wiring in the drivers B pillar >>> the pillar where the upper part of the seat belt attaches or where the drivers door latches.
There may be a electrical short, causing the erratic issues?!?
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Old 02-28-2020, 06:01 AM   #4
JWA
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Typically such symptoms tend to center around the door switches---check them for a good connection to the chassis wiring harness and that they're indeed working properly.
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Old 02-28-2020, 06:08 AM   #5
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Awesome, thanks a bunch. This info is hugely helpful Unreg. Ill start at the door switches and work my way back from there
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