Interior Lights Issue
Thread Starter
Heel & Toe
Joined: Jun 2009
Posts: 23
Likes: 0
Interior Lights Issue
Interior lights won't turn one when either door is open, but can turn them on by the head lamp switch.
My first issue was a buzzing relay under the glove box and the door interior lights wouldn't turn on. Found out that we had a bad fuse and replaced it took care of the buzzing relay and was able to turn on the interior lights by the head lamp switch.
Now that this is fixed the interior lights won't go on when either door is open. Could it still be a bad relay or a bad switch on one of the doors?
This is on a 1993 convertible.
My first issue was a buzzing relay under the glove box and the door interior lights wouldn't turn on. Found out that we had a bad fuse and replaced it took care of the buzzing relay and was able to turn on the interior lights by the head lamp switch.
Now that this is fixed the interior lights won't go on when either door is open. Could it still be a bad relay or a bad switch on one of the doors?
This is on a 1993 convertible.
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 41
From: Baltimore, MD USA
If the blown fuse was the RH CTSY 5 amp fuse
it provides 12 volts for the following items via
a Orange wire.
RH, LH Door Courtesy bulbs.
RH, LH Footwell bulbs.
Dash Glove compartment bulb.
Rear view mirror Courtesy bulbs.
Courtesy lamp relay.
Center Console glove compartment bulb.
To verify if either Door Ajar switch works,
turn ignition On and open either door.
The Door Ajar indicator light in the dash cluster
should light.
To eliminate the Courtesy Lamp Relay.
At the very front edge under the passenger side
dash where you heard the buzzing noise are a group of
5 relays.
Two relays are grouped together towards the passengers
door. Then there are 3 relays towards the transmission
tunnel.
The 2nd relay from the passsengers door is the Courtesy
Lamp Relay. The relay closest to the passenger side door
is the Fog Lamp relay. You can swap those around and see
if that cures the problem.. All 5 relays are the same.
From right to left relays look like this.
Fog Lamp-Courtesy lamp-------- Fuel pump-Horn-Rear Defogger relay
it provides 12 volts for the following items via
a Orange wire.
RH, LH Door Courtesy bulbs.
RH, LH Footwell bulbs.
Dash Glove compartment bulb.
Rear view mirror Courtesy bulbs.
Courtesy lamp relay.
Center Console glove compartment bulb.
To verify if either Door Ajar switch works,
turn ignition On and open either door.
The Door Ajar indicator light in the dash cluster
should light.
To eliminate the Courtesy Lamp Relay.
At the very front edge under the passenger side
dash where you heard the buzzing noise are a group of
5 relays.
Two relays are grouped together towards the passengers
door. Then there are 3 relays towards the transmission
tunnel.
The 2nd relay from the passsengers door is the Courtesy
Lamp Relay. The relay closest to the passenger side door
is the Fog Lamp relay. You can swap those around and see
if that cures the problem.. All 5 relays are the same.
From right to left relays look like this.
Fog Lamp-Courtesy lamp-------- Fuel pump-Horn-Rear Defogger relay
Safety Car
Joined: Aug 2009
Posts: 3,745
Likes: 275
From: Melbourne, Victoria, Australia
On my 85 when my timer delay module failed the interior light would not come on when doors or hatch were opened. The cluster light dimmer in the headlight switch did make the courtesy lights work when turned fully anticlockwise, so very similar.Do you have a Factory Service Manual for your year vette to locate where the courtesy delay timer module is located? and how to test it?
Good luck
Good luck
