HELP! F150 3rd brake light - cab and cap

[PaxtonShelby]

Hi - I need some help...

I have a '94 F150 XLT 4x4 standard cab long bed.

The truck has a caP with a brake light in the rear window.

I can't get the 3rd brake light in the caP to work properly. I have the caP light spliced into 2 of the 3 wires in the driver's taillight.
The caP light will work fine with parking lights on or off when I hit the brake.
No parking lights on - the caP light is off. Perfect.
Parking lights on - the caP light is off. Perfect.
Brakes applied with parking lights on or off - the caP light is on. Perfect.

The problem is that when I use my driver's turn signal ( that's the side the cap brake light is wired to ), the caP brake light blinks with the driver's side turn signals.

So it won't pass PA inspection ( due 3/31/10, of course ).

It passed inspection otherwise, but this issue is KILLIN me!!!

I've tried every combination of wires between the cap light and the driver's side taillight - and no luck.

Here's twist #1 - the light on the back of the caB ( not the caP ) has a white lens on either side, with a red lens in the middle. I assumed that the center ( red ) portion would come on when the brakes are applied. But when I hit the brakes the center ( red ) portion of the caB light does not light up. In fact, it doesn't light up no matter what I do. The outer (white) portions of the light up when I open a door or turn on the dome light by twisting the headlight switch, but the center ( red ) section of the caB light does not work at all.

So - can someone tell me if the red portion of the caB light is supposed to light when the brakes are applied? I'm guessing '94 might have been one of the first years with a light on the back of the caB? My caP is very tight against the caB ( like maybe 1 inch of clearance ), and there is no way for me to remove the caB light lens to check it out unless I remove the caP, and I really don't want to do that.

Twist #2 - I talked to a mechanic/friend, and he said that I need to find a splitter with a delay capacitor in it. It gets spliced into the taillight wiring and, supposedly, when I use my turn signal with the brakes applied, the capacitor has enough juice to keep the caP light lit while the turn signal blinks, resulting in a steady brake light. What happens when I use my driver's signal is on but my brakes are NOT applied....I have no idea. Anyway, I've been to several parts stores and nobody has a clue what it is I'm looking for. I don't have any truck accessory places in my neighborhood, but if I have to drive somewhere to find this hen's tooth, I certainly will.

Any and all help would be GREATLY appreciated.

Thanks folks!!

Ron

[PaxtonShelby]

Finally had some time to tinker with the truck today, and I spliced directly into a wire coming from the brake pedal switch and ran a wire thru the firewall and along the driver's side framerail to the back of the truck to the cap light. Thank goodness everything works. So now I can finally get my inspection sticker... :)