Electrical issue
Thread Starter
Heel & Toe
Joined: Apr 2014
Posts: 15
Likes: 0
From: Charlotte NC
Electrical issue
Hello all,
I have an issue that cropped up on my '94 last week. I noticed alternator whine in the speakers, and fluctuations in the LCD portion of my dash. My first thought was that the alternator is on its way out. I verified its output and it seems to be right on.
Yesterday I decided to do some troubleshooting, thinking it might be related to the tuner in the storage compartment. After some tinkering with that, I checked the speakers again, and the whine was gone. Yay! No! Today when I fired up to go to work, the whine was back, and when I turned the stereo off and back on, the LCD blinked off then back on. I also noticed that when raising the passenger window, I heard some popping in the right speaker near the top of the window's travel. Back to square one! Any thoughts out there?
I recently replaced the passenger window guide, but the hum did not appear for a few weeks. I also cleaned out the storage bin. It had collected some water, but the tuner was not wet.
I have an issue that cropped up on my '94 last week. I noticed alternator whine in the speakers, and fluctuations in the LCD portion of my dash. My first thought was that the alternator is on its way out. I verified its output and it seems to be right on.
Yesterday I decided to do some troubleshooting, thinking it might be related to the tuner in the storage compartment. After some tinkering with that, I checked the speakers again, and the whine was gone. Yay! No! Today when I fired up to go to work, the whine was back, and when I turned the stereo off and back on, the LCD blinked off then back on. I also noticed that when raising the passenger window, I heard some popping in the right speaker near the top of the window's travel. Back to square one! Any thoughts out there?
I recently replaced the passenger window guide, but the hum did not appear for a few weeks. I also cleaned out the storage bin. It had collected some water, but the tuner was not wet.
Le Mans Master
Joined: Oct 2004
Posts: 6,314
Likes: 508
From: South-central Missouri
It has the earmarks of a grounding issue. Do you have a FSM? That would be a place to start; see what ground connections are common with those systems that seem to be related...is a good place to start.
Good luck!
Good luck!
Thread Starter
Heel & Toe
Joined: Apr 2014
Posts: 15
Likes: 0
From: Charlotte NC
Fixed!!
It was the alternator itself as it turned out! My mechanic gave me a couple of tricks to try in troubleshooting, and it was the alternator. Fixed 'er up and all is good now. No more electrical gremlins. Thanks for the input!
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
