I think the relay mod that PCB did is the best solution. It keeps any current from going through the switch and thus keeps any arcing etc away and the relay is more than capable if handling any current etc. Being the type of person I am I like to find the root cause if an issue.
Does anybody...
https://www.mazdas247.com/forum/showthread.php?123819018-How-to-Permanently-fix-the-quot-no-A-C-on-fan-speed-2-3-quot-problem
Is that the resistor mod that you did? This just forces the voltage on the sense wire to be within range. This doesn't fix the problem itself.
With my original switch...
If i get a chance I will post the wiring diagram for the fan switch tonight.
The ground point is the high resistance point that was putting the AC sense line out of spec.....i think. But since I cannot find it and look at it directly I cannot say 100%.
What got me down this path was the over...
So after a couple of weeks it seems to be working ok. Though I have noticed the #4 wire still getting quite warm. I might try to do something similar to what PCB above did with the relays. It would be really nice to mount them on a PCB with a plug so that I dont have to worry about cutting and...
I would actually be interested to see what resistance to negative on the battery is for several owners.
Before I did the mod it was >1.5 ohms, after <0.5.
If I can I will try to get a picture of the ground braid that I installed when I install the new bezel.
If its the blower motor resistors, you can get a new resistor pack and swap that out. Would be easy and cheap to do. I did this and it didn't change anything for the operation of the AC.
By hard wiring resistors you reduce the slight parasitic resistance for the wire and connectors from the...
Hardwired resistors might or might not work. Since the issue is the ground adding resistance and changing the voltage the ECU reads as being out of spec.
There was also a thread on a forum where somebody added some active electronics to fool the ECU but this didn't address the actual issue of...
I soldered in 1/2" braid to the ground wire and took that to the frame and its all good now. Still a slight blink at position 2, so I will replace the switch.
I was measuring 1.5 ohms from the ground to the negative terminal of the battery, which is way too much for a short wire like that...
It has been forever since I have posted here.
Anyway I have had my Pro5 since new in 02. Still driving it with 200K+ miles on it.
I finally figured out what the issue is with the fan switch that it seemed many a while ago were having. The ground connection for the fan switch is not a good one...
My wifes sunroof drains are clogged on her 6 and I cannot for the life of me find the drains. Is there an easy way to access them from outside of the car?
I tried using a bicycle brake cable from the top to poke through the clog but had no luck