Dash Brake Light Stays On

[dodgemain]

Hi,
Ever since I installed a new S3 Smart Start Control Box the Brake Light on the dash stays on. I even tried my spare and the same thing happens. If I install my old style control box this is not an issue. Is there any known problems with the S3 Control Boxes? I did check the Parking Brake Switch and it is working properly. Any ideas greatly appreciated.
Thanks

 

[M1224]

I'd start with the wiring diagram and trace the 12V and Ground sides of the brake light. Just to see if either circuit is shared with the box.

Have you done a ground harness on the truck yet?

 

[TedG]

Here is a good article. It is for newer ecv's but the same advice for m998's