Illini82

For the last month or so my HUD has intermittently been acting up. The display always displays something, so I don't believe it is anything with the HUD unit, but half the time all I get is " -- -- " (or the middle lines of where the two digits would be). I monitored the battery for the last week or so and noticed it fluctuating during driving. I was also getting random ABS/Active Handling and Engine codes.

I stopped by Autozone tonight and sure enough there was only about 65% charge, so I picked up a new battery. To my suprise, the voltage while I was driving was lower (13.8 V) that it was with the bad battery (14.1 V) and the HUD was not functioning. I've gone through my service manual, and didn't find a lot of help.

Has anyone had this problem before and found the issue? I just unplugged the battery and am going to leave it there for a half hour or so to reset everything.

Any help would be much appreciated!

dgrant3830

The hud gets its data from the IPC which its connected to directly. Is your IPC actiing up too? Try pulling your codes while you're at it.

Illini82

I pulled the codes, and there are no IPC codes. Disconnecting the battery did not help, but I put it on my battery tender all night and now this morning the HUD was working again? The battery voltage while running was back to 14.3V.

Do I have something pulling current somewhere? Is it time to start checking grounds? I did notice that when I used the turn signal this morning, the voltage on the DIC went to 13.8 while it was on. Is that what I should expect?

dgrant3830

I would check the battery connections to insure they are clean and tight then check the connections at the starter solenoid which is where all of the electrical comes together.