1986 electrical issues
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 21
Likes: 0
1986 electrical issues
I have a 1986 Corvette with the standard L98/automatic.
Normally when you open the door, the courtesy lights turn on. If you turn on the headlights before you turn on the ignition, a little ringing noise comes on warning you the headlights are on without the engine running. Also, the heat/air controls do not work when the key is off. When the key is in the ignition position, the courtesy lights turn off, the headlight warning noise goes off and the heater controls work.
Just the other night I started the car as normal. First thing I noticed is the courtesy lights didn't turn off as they should, The headlight warning indicator stayed on the whole way home and the heater controls do not work at all. I've replaced the ignition switch and that had no effect.
Has anyone ever had an issue like this?
Normally when you open the door, the courtesy lights turn on. If you turn on the headlights before you turn on the ignition, a little ringing noise comes on warning you the headlights are on without the engine running. Also, the heat/air controls do not work when the key is off. When the key is in the ignition position, the courtesy lights turn off, the headlight warning noise goes off and the heater controls work.
Just the other night I started the car as normal. First thing I noticed is the courtesy lights didn't turn off as they should, The headlight warning indicator stayed on the whole way home and the heater controls do not work at all. I've replaced the ignition switch and that had no effect.
Has anyone ever had an issue like this?
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 41
From: Baltimore, MD USA
12 volts should be at the 10 amp Gages fuse when the ignition switch
is in Run, Bulb Test or Start.
If it's not, you'll have the problems you described.
The Gages fuse provides 12 volts for the following.
HVAC Programmer
HVAC Control Head
Defogger Relay
Canister Purge Solenoid
Vanity Mirror lamp
Header Map lamp
Reset voltage for Courtesy Lamp Delay Timer
ABS Relay
Radiator Low Coolant Module
Audio Alarm Module
For Automatic trans. Torque Converter Clutch/Cruise Brake Switch
Overdrive Relay for Manual trans.
Air Switch Solenoid
Air Divert er Solenoid
EGR Solenoid
Verify the fuse panel contacts for the Gages fuse are not corroded.
is in Run, Bulb Test or Start.
If it's not, you'll have the problems you described.
The Gages fuse provides 12 volts for the following.
HVAC Programmer
HVAC Control Head
Defogger Relay
Canister Purge Solenoid
Vanity Mirror lamp
Header Map lamp
Reset voltage for Courtesy Lamp Delay Timer
ABS Relay
Radiator Low Coolant Module
Audio Alarm Module
For Automatic trans. Torque Converter Clutch/Cruise Brake Switch
Overdrive Relay for Manual trans.
Air Switch Solenoid
Air Divert er Solenoid
EGR Solenoid
Verify the fuse panel contacts for the Gages fuse are not corroded.
Thread Starter
Heel & Toe
Joined: May 2010
Posts: 21
Likes: 0
Oh how I love this board!!!
Sure enough, my gauges fuse was blown. I thought since the digital gauges worked that it would be good, but it seems to me I ran a meter across each fuse and it appeared good...don't know how I missed that one. But I'd have never thought to look at that particular fuse. I must be getting old or something.
Thanks Hooked.
Sure enough, my gauges fuse was blown. I thought since the digital gauges worked that it would be good, but it seems to me I ran a meter across each fuse and it appeared good...don't know how I missed that one. But I'd have never thought to look at that particular fuse. I must be getting old or something.
Thanks Hooked.
