2000 deville speedo problem!
Hey, please can anyone shed some light on the problem i am having!
My caddys speedo and cruise control both do not work. There are no DTC codes showing/check engine is not on either. I have verified (with my elm327 tech scanner) that the vss speed signal works - cause i get the speed come up fine on my computer when driving it with the tool attached. But the speedo just sits at 0mph! I though okay it must be the ipc - well guess what i bought a new one and still nothing...I'm pulling my hair out with frustration - can anybody help?
O and what voltage is supposed to be coming out of the pcm to the speedo - cause i put a voltmeter and it shows 12v when running! - does not change when driving around either...Maybe its a bad PCM????
Please any help would be soooo appreciated.