Today i putting in the Brake controler in my 2005 Mercury Grand Marquis Ls the problem i have is which wire to hook up the red wire from the Brake controler to the brake light switch on the car down at the brake switch there are two wires one is Light Blue with a Black strip and the other one is orange both have power on them but when i push the pedal the orange wire has no power and the blue wire still has power so which one do i hook to ?? i even look on the internet to day no help there so what to do any help would be helpful.
Newer brake lights switches may have wires for the transmission and shift interlock etc, So I try to stay away from them. If you look at your third brake light in the back window, what color is the wire that gets power when the brakes are applied? This wire can be used to signal the brake controller anywhere from under the dash, left kick panel, or drivers door sill to the third brake light itself and maybe easier to connect to. I find the door sill the easiest and it will not effect anything else on the TV (tow vehicle). IIRC the green/red wire if the brake light feed (hot) the light green goes to the turn signal switch to feed the normal brake lights and the dark green is the third (high mount) brake light feed. Hope this helps, Ray
There are two switches on the brake peddle (they may be combined into one). One for the lamps and one for the cruise control. The lamp switch has a Red wire that is B+ from fuse 14. And one or two Lt. green/red wires that are the switched brake lamp feed to fuse 28 for the high mount stop lamp and fuse 30 for the regular stop lamps (thru multifunction switch) The cruise control de activation switch uses the orange and Lt blue / black wires. So you need to tap the Lt. Green / red wire.
[quote author=BigJim link=topic=1450.msg11633#msg11633 date=1331592438]
I see the LTGreen wire with the red strip the ford dealer said the same thing about the Ltgreen wire with the red strip i going to take a look at the wire for the thrid brake light and see what color the wire and take the test light and check the trid brake light. thanks guys
The wire for the thrid brake light from fuse #28 is Dark Green.
[quote author=BigJim link=topic=1450.msg11649#msg11649 date=1331604945]
TMMUll do i need to come off the fuse #28 or just hook it up at the thrid Brake light ?
Since the controller is mounted under the dash I would go to the green/red wire off the brake lamp switch, it should be the easiest to access. Trying to find the right dk green wire off the back of the fuse block might be difficult without the connector pin outs and if you go directly to the third light it takes a lot of wire to get back to the dash.
[quote author=BigJim link=topic=1450.msg11691#msg11691 date=1331685806]
TMMull i took off the kick panel and there was some wires there and there was the green/red wire and that's were i hook the red wire from the controler. as for the ground wire i should be oh to ground to the body because there are two ground wire already there ?
Any metal in the dash will be a ground especially if there's already one there from the factory.
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