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Old 06-09-2012, 09:59 AM   #1
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Cool problem with 2000 31 brave se headlights and turn signals

hey guys and gals, have a very big issue with my wiring harness on chassis. there is a part called a modulater assembly diode that is a black box with a board in side containing lots of caps and diodes and such and on top is a aluminum heat sinc. the wiring harness for headlights, running lights , and turn signals plug into this and then plug out and wires than run to components.
i have been blowing fuse's every time i try to use my signals. my mech. and I traced issue to this box. when bypassed all lights except right front turn signal works yet the light and wire are good.
here is the thing. this is a workhorse part that is out of production......no one has this part. can provide gm oem prt no. if needed....help
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Old 06-09-2012, 01:05 PM   #2
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Here's one source: workhorseparts.com

Nearly all those mystery modules have a P/N either on a stick on tag, or embossed into the plastic. Workhorse has many modules listed as a Modulator...mostly for the ABS system. Modulation is a term applied to a circuit that rapidly switches something Off/On. I would be surprised if any of your lights were 'dim-able', which would be the only reason to 'modulate' them. Only thing I can think of that would be dim-able would be the dash lights. If you have a simple pot instead of a heavy rheostat to dim your dash lights perhaps that's what it is...in which case you could bypass that whole box for the lights, and install a rheostat for the dimming function. (Just thinking out loud here).

Maybe if you posted a picture of the device we could give you more specific help.

Here's an item called an Electric Modulator: ELECTRIC MODULATOR 12 V DC
but they don't give any details.
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Old 06-09-2012, 06:34 PM   #3
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thanks will take pic and post.
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