Hi All
Wondering if anybody knows where the green w/blue wire off the snowflake switch light bulb goes to or how the control system on lighting that bulb works. My A/C works fine but I'm no longer getting 12 vdc in that wire when it's running and so no lighted bulb. The Bentley's wiring diagram does not appear to depict it and is overall hard to decipher.
Thanks,
Robb McC

All - I'm just having a probably important realization on this and that maybe there is a connection to me having done the blower motor last winter. I wonder if I got the bulb holders on the AC switch mixed up with one of the other lighted rocker switches?? Does one of the others (heated mirrors, hazard, rear defrost) have 2 wires on it instead of one with one being green with blue stripe? This will be an easy thing to figure out tonite. Maybe not so easy getting just the bulb holders moved around between rocker switch locations without pulling the console out!
Robb McC

Hi Robb,

"That wire" is probably the ground wire. The bulb gets its + side internally from the switch.

Scroll down a ways in this. http://cleanflametrap.com/ac.html
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Art Benstein near Baltimore

Those who jump off a Paris bridge are in Seine.

Art - going to have to study it some more but in a glance it seems what I have on the back of the snowflake switch does not match any of those 91 and on pics or diagrams. The snowflake bulb is in its own holder with 2 wires - black and green with blue that disappear off behind the console,i.e., the bulb's plus does not come from one side of the switch internally. Right now my motivation to have everything functional is losing to my lack of desire to pull that console in the heat we've been having. Maybe this weekend...
Robb McC

Robb,

Your description of the snowflake switch is different from any I've ever seen. We have one 93 in our fleet now, but I can't recall seeing whether it was any different from the rest. Both 1993 wiring diagrams show the switch as I know them, only three wires. Post a pic if you can. Maybe you have a TSB retrofit others have run into.
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Art Benstein near Baltimore

The short fortune-teller who escaped from prison was a small medium at large.

Art - see my other post - I might have the bulb holders between rocker switches mixed up from blower motor job in Feb and this is the first I used the ac since.

Their should be three wires on the back of the switch. A bl/y a gr/r and a black. The power to the switch comes from the AC relay on the bl/y. When the switch is on the power goes back to the Ac relay which then turn on the AC. The black wire from the switch in the ground wire for the light. The relay has it own ground. My guess is the ground is bad the switch has an internal fault or the bulb is defective.

Hope this helps,

Ron J

hmm, I wonder what can explain why everything that should be right is wrong about the wiring on my switch? Maybe it's another one of those unique to late 93 things? My switch has 4 wires - yellow with blue and grey with red to the switch part of the switch. And then to its separate bulb holder (that has no connection to the rest of the switch - it slides into the back) a green with blue and a black. The bulb is the 1.2W "grain of wheat" bulb. The switch part works and the A/C runs fine just no voltage to the green with blue stripe wire on the bulb holder and I can't find a wiring diagram that shows it.
Robb McC

On the back of my old switch there are three connectors. Two that control the AC and one for the light. The pin on the back of the bulb holder is where the black wire connects. You may won't to pull the bulb holder out and check with a meter to make sure you have a good connection through the bulb holder.

Ron J

Ron - see my other replay at the top level. I believe I may have mixed up bulb holders last winter when I did the blower motor and just now that it got hot am discovering this. Now to find the other rocker switch with a non-functioning bulb. I don't think I've used the hazards or heated mirror since blower motor replacement so I bet it's one of those. So self induced is the answer (probably). But really if that's all I messed up in a blower motor job, I'm still very happy.

robbmcc,

I've looked as some of my old switches and they all have the exact same bulb holder. From what I can see you could use a fog light switch or a heated seat switch an plug the AC on the back and it would work. They all have the same three connecters and they all are switched the same. Positive on top, switch in the middle and the build holder with ground.

Ron J