You will not receive 12V at the plug without the speed sensor in the loop AND the vehicle running.

Look at the ETM for a schematic of that circuit on the 1990+ cars with the MAS relay or search 'KLIMA relay' on the earlier cars. Same deal.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]