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#1
05-12-2011, 05:29 PM
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No power to wiper motor, but washer works? '96 E320 W210
There is good continuity across the motor, but no power - or ground on the brown wire - at the motor connector (I assume brown is ground, but is it switched?). The only thing that may be causal: the wiper worked (I guess) until I was checking the fuses for 12v on my ABS/ASR problem (which turned out to be cured, for now, by disconnecting the 3rd brake light which had a connector that was arc'd away, but worked nevertheless) and the "DEFECTIVE INSTRUMENT CLUSTER" or whatever showed up - only twice, though.
Last clue: there is a faint tick from the behind the center of the dash whenever the wiper switch is turned on/off. No sounds at the motor, FWIW. All fuses 2X checked. SO did I fry something or is there a relay and/or delay module somewhere? I have searched extensively, but all I've learned is that these cars must have a bulletproof wiper system - not much info, although I DID find the "wiper motor controller relay" for 1995s (below) not sure if it applies - if so WHERE IS IT?? (above is a 1995 SL, will be searching underhood on mine soon) Is that dastardly K40 multi-relay module somehow tied into this? TIA! -Tom
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RIP "Betsy" (Oo=*=oO) '96 E 3 2 0 (W 2 1 0) M 1 0 4 (Totalled) Spaces in sig so as not to screw up the SEARCH; every time someone searches for that MB they don't want my sig! 2004 Audi A8L '98 VW Passat 1.8T 5M '87 Alfa Romeo Milano 2.5L 5M '67 Impala convertible, 327cid 
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#2
05-13-2011, 10:28 AM
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It was a bad connection at the rearmost module in the passenger side box, near the firewall. There is a very large connector (at least 20 pins & 3x10cm) at the bottom, held on with one of those lever-clamps used on some ECUs; but the smaller (2x3cm appx) plug near the top had not been fully seated (by me) when I was probing around; thought it was clamped in by the lever, too, but the assumption proved false.
anyway nice surprise, no $ fix, even if the problem was created by me!
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RIP "Betsy" (Oo=*=oO) '96 E 3 2 0 (W 2 1 0) M 1 0 4 (Totalled) Spaces in sig so as not to screw up the SEARCH; every time someone searches for that MB they don't want my sig! 2004 Audi A8L '98 VW Passat 1.8T 5M '87 Alfa Romeo Milano 2.5L 5M '67 Impala convertible, 327cid
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