dude! that's the car making sure it doesn't overheat! It's alive!

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1964 datsun 1500
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this is where I quote some dude, so I look smart because of quoting that dude that said something smart once

i found out this weekend that ACC units are not universal between 123 and 126. bummer.

my unit works okay, i.e. does not need resoldering, but sombody fat fingered the buttons and broke the spring keepers off most of them. as far as i can tell, i need to completely unsolder them from the boards and replace the whole pushbutton thingy. Anyone got a trick to replace the button posts without removing the whole switch body?

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84 300SD ODO broken at 277k
02 Jetta TDI
KHS roady, stumpy hardtail- powered by carbohydrates
OBK56

I soldered up the CCU and cleaned out the fan switch, but I still have no fan control. The rest of the CCU seems to work fine. I also cleaned the contacts on the sensor just above the thermostat housing with no joy. What is next, the fan its self?

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

The fan (easy to test with jumpers, at least at full, 12v setting) or the resistor, located on the firewall, usually pass side in engine compartment.

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1984 300D Turbo - 4-speed manual conversion, mid-level resto

1983 300D - parts car

1979 300TD Auto - Parts car.

1985 300D Auto - Wrecked/Parts.


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"If you don't know where you are going, any road will get you there". Lewis Carrol

OK, I've been reading and posting on the forum for a couple of months and I've got a good understanding of the dozen or so problems and how to fix them including resoldering the CCU. Just need more wrench time.

For years, our 83 300D has had a tempermental CCU that works sometimes. Today it was the defog windshield that would not come on (no fan at all). For years now, my wife fixes these problems by shutting the car off and restarting - problem goes away about 75% of the time. It makes no sense to me why that would work.

After about 10 minutes of her nagging today, I pulled over turned off the engine, waited her prescribed 10 seconds and restarted. Defog can on immediately and worked the rest of the way home. She even cycled it to regular vent and back based on fog and temperature needs.

The only way I can contend with her smug "I told you so look" is to come up with an explanation as to why her method works.

Please help - the masculine dominance in car repair needs redeeming!

Charles