That annoying tick-tock sound - F-Body Road Racing and Autocross Forums

I asked a long time ago about a tick-tock sound coming from the dash somewhere. Every 5 seconds it would tick-tock, like a turn signal flasher. I narrowed it down to definitely the passenger side, definitely electrical (not a vacuum door on the HVAC), always while ignition key was in RUN even when engine not running. Then the other day I had a break through- it tick-tocked when I opened the door, after turning off the car and sitting for a minute. Security? Not HVAC electrical for sure. I took off the lower foot panel and the glove box door, and listened. The BCM? Oh man.

Then I remembered I had taken out the fuse for the interior courtesy lights about a year ago (to save electricity for my tiny battery, to not have to have the rear view mirror lights go on or accidently get bumped on). Let me try that- HALLELUYAH. Tick tock noise stopped immediately. So, if that fuse burns out or you take it out, you get that annoying sound like a flasher or slowly going bad relay.

SuperMacGuy View Member Profile	Apr 20 2019, 10:29 PM Post #1
Experienced Member Group: Advanced Members Posts: 1,017 Joined: 18-September 04 From: State College, PA Member No.: 462	I asked a long time ago about a tick-tock sound coming from the dash somewhere. Every 5 seconds it would tick-tock, like a turn signal flasher. I narrowed it down to definitely the passenger side, definitely electrical (not a vacuum door on the HVAC), always while ignition key was in RUN even when engine not running. Then the other day I had a break through- it tick-tocked when I opened the door, after turning off the car and sitting for a minute. Security? Not HVAC electrical for sure. I took off the lower foot panel and the glove box door, and listened. The BCM? Oh man. Then I remembered I had taken out the fuse for the interior courtesy lights about a year ago (to save electricity for my tiny battery, to not have to have the rear view mirror lights go on or accidently get bumped on). Let me try that- HALLELUYAH. Tick tock noise stopped immediately. So, if that fuse burns out or you take it out, you get that annoying sound like a flasher or slowly going bad relay.

GCrites80s View Member Profile	May 29 2019, 01:27 AM Post #2
Advanced Member Group: Advanced Members Posts: 647 Joined: 30-January 15 From: Columbus, OH Member No.: 223,855	The guy in this video was having the same problem with his '95 C1500. It was driving him nuts! TICK-TOCK! TICK-TOCK! You can see how he solved it. https://www.youtube.com/watch?v=QcHvzNBtlOw