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need help with 91 Zr-1 Electrical issue


Well-known member
Oct 28, 2004
zr1.net registry,N.J. Director
1991 zr1
I hope everyone is well. I took my ZR-1 out today 1st time since Nov. Last time I drove it everything was fine. I noticed I left my glove box was open and I was expecting a dead battery.Car started right up but I noticed other things not working.
1. No courtesy lights, dome ,pillar etc. Light on rear view mirror does work. Turned dimmer switch but that didn't help.
2. Radio turns on looks normal, CD, radio all look normal but no sound, antenna won't go up.
3. Heat/AC controls nothing lit up. DEAD.
Everything else checked out on the car switch wise ,car ran great.
I checked all the fuses on passenger side fuse box, all ok, FUSE (1) 15 amp seems to control most of these items. I replaced even though it was fine. No luck. Checked AUX fuses on passenger side under hush panel , all fine.
I checked that door light switches were working, they read door ajar so I think that is not the issue. I did leave that glove box open for several weeks with trickle charger on.I read somewhere I could have burned out a relay some where. Any help would be appreciated
Todd Cerami

Did you have the car on a battery tender while it was sitting? Is the battery fully charged?
battery at 12.8, checked for codes and it came up with H25 "courtesy lamp relay circuit open or shorted to ground" gonna have to do some searching on this now, swapped courtesy lamp relay with the same type of relay from road lamps relay, no change.so that eliminates that.


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