I have a question about troubleshooting the Light Control Module in my 323CI. I know that if I put in a used LCM the car will turn on the tamper led on the dash. However, if I re-install my original LCM will the tamper led clear?

(This will let me see if the LCM is causing my failed backup lights. I get 12v at the backup lamps with the bulb out, but only 0.5 v with the bulb in. Ground is good. Reverse switch seems OK.)

Thanks.