Dome light trigger for Mercedes 300E

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Turbo W124

Member - Posts: 3

Joined: August 31, 2002

Location: United States

Posted: March 12, 2003 at 9:34 PM / IP Logged

How would I go about doing this? It seems easier to splice into the rear door sensors. Are they grounded when the doors are open? (Does this mean negative door trigger?) Thanks!

Velocity Motors

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Joined: March 08, 2002

Location: Manitoba, Canada

Posted: March 13, 2003 at 4:31 PM / IP Logged

What year 300E ?

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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Turbo W124

Member - Posts: 3

Joined: August 31, 2002

Location: United States

Posted: March 14, 2003 at 2:12 AM / IP Logged

It's a 1987 model. Thanks for any help!

Car-Stuff

Member - Posts: 26

Joined: March 02, 2003

Location: United Kingdom

Posted: March 14, 2003 at 9:56 AM / IP Logged

The older Mercs normally have seperate circuits for front and rear doors. The door switches just pop out, I think they are something like BROWN / Grey from memory at the rear of the front and rear switches. You will normally have to split your input to your alarm via 2 diodes.

Hope this helps

Nick

Jussi

Member - Posts: 29

Joined: January 26, 2003

Location: Finland

Posted: March 14, 2003 at 2:58 PM / IP Logged

Yes, that's correct. You have to use diodes and if your alarm "needs" groundable wires... you have to use couple of relays also :-(

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JL-Autosound

Helsinki, FINLAND

Velocity Motors

Moderator - Posts: 12,488

Joined: March 08, 2002

Location: Manitoba, Canada

Posted: March 14, 2003 at 4:16 PM / IP Logged

| 12V|red |+ |ignition harness - |

| WIPERS|blu and blk (hi/low)|+ |*4 |

Notes:

*1 GREEN/ YELLOW at back of instrument cluster. *2 Blue wire located in 1/4 inch blk rubber tube with RED / wht and brown wires coming out of drivers door. Passenger side same except trigger wire is green. Pump located under rear seat on passenger side. *3 Front doors are brn/gry-at right pin or alarm module located under passenger foot board. Rear doors are brn/gry/blk-at pin or alarm. *4 at combination switch, also found at the switch plug Blk/yel/gray and Blk/yel/wht for high and low wiper speeds.

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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Dome light trigger for Mercedes 300E

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