[urq] LED Taillights and cruise control

[Steve B]

Makes prefect sense.  The CC system uses the filaments in the brake light circuit as a ground in one of several fail safe mechanisms built into the system.  Your LEDs don't provide a low enough resistance to ground for the CC controller.  

What can you do?  If you have the dual bulb plates in back you could install one LED, and one incandescent bulb on each side.  You could get the wiring diagram, find the ground for the CC brain and connect it directly to ground; of course this would eliminate one of the multiple redundancies.  You'd still have a vacuum and an electrical switch on both the clutch and brake to disengage the CC.

If you installed the brake light on the rear window and retained incandescent bulbs there it might be sufficient to ground the CC.

So, where did you get your LEDs, and how well do you think they are working?

Steve Buchholz

AF <afinn1 at gmail.com> wrote:

>This could be a red herring issue but it seems ever since I put super bright LEDs in all my Taillights on the URQ that the cruise does not work when the lights are on. Somehow I'm guessing power is feeding back into the brake light system from the Taillights triggering the safety shutoff. Anyone else had this issue?
>
>Andrew Finney
>1985 UrQ
>
>Sent from the road
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