Speedo Problem
Thread Starter
Racer
Joined: Nov 2004
Posts: 312
Likes: 0
From: Sacramento CA.
Speedo Problem
I have a ’90 vert. A couple of months ago the speedometer quit working, showes 00 mph. 
Other dash functions related to speed are also inop. If I lightly touch the brake (just enough to light the brake lights) all functions return to normal. Speedo returns to 00 when brake is released. I measured the input signal to the ECU, same thing no signal until the brake peddle is pressed. The signal is fine at the VSS. Anyone run into this problem? Any ideas? HELP PLEASE
Other dash functions related to speed are also inop. If I lightly touch the brake (just enough to light the brake lights) all functions return to normal. Speedo returns to 00 when brake is released. I measured the input signal to the ECU, same thing no signal until the brake peddle is pressed. The signal is fine at the VSS. Anyone run into this problem? Any ideas? HELP PLEASE
