original CC screwed up - ran in off position, etc... found burnt circuits on board

checked all fuses - OK

blower regulator appeared tampered with... replaced with used/tested unit

checked blower.... motor runs

unplugged aux. water pump (in case this fried first CC board)

Installed used/tested CC unit.... NOTHING... can't get the fan to run in any position. (at least it doesn't run in the off position like the old one did!)

Any ideas where to go next?

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'83 300D
'85 300D
'01 VW TDI

Did you check the fuse?

Apply some dielectric grease to the pins on the connector?

Test for voltage at the unit?

RSCarey

All the fuses in the panel were checked OK

I am getting voltage at a couple of the pins... Does anyone have a good wiring diagram that I can figure out the function of each pin and the proper voltage?

__________________
'83 300D
'85 300D
'01 VW TDI

I've now cleaned the entire fuse box and replaced all the fuses.... dielectric grease on all the connectors

STILL NOTHING!!

Have I stumped the forum?

You've gotta love the German A/C systems!

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'83 300D
'85 300D
'01 VW TDI

The CCs have the same part#?

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'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

Yep, exact same part #


Could the temp control regulator keep everything locked out?

I can't find a clear wiring diagram of the A/C system to trace it out. Does anyone have a clear readable A/C wiring diagram?

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'83 300D
'85 300D
'01 VW TDI