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#1
10-26-2013, 03:02 PM
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Why would leads to auxiliary water pump be cut?
Getting acquainted with my new 1998 E300D....noticed that heat was weak at idle but fine otherwise, so I figure I have a bad auxiliary water pump. But when I look at the pump, I find that the leads have been cut. Why on earth would anybody do this? I mean, if the AWP were causing some sort of problem and the PO didn't want to replace it, why not simply remove the connector?
Any ideas? I'll call the dealer on Monday to see if anything shows up in the maintenance history.
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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles 06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete 19 Honda CR-V EX 75k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife 
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#3
10-26-2013, 04:25 PM
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Connectors can be difficult to remove in adverse conditions. Once I wanted to disconnect the kickdown switch and it wouldn't oblige. I pried off the connector with a screwdriver breaking the retention clips.
Sixto 87 300D
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#4
10-26-2013, 04:32 PM
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I know that on my 190 the connector is super suck on the aux pump. I think an animal chewed through one of the wires and I was going to redo it but couldn't get the connector off..so I just cut them and taped them.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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#5
10-26-2013, 07:10 PM
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I'm sure that's what happened....dealer couldn't get connector off so just cut wires.
Oh well....I have other cars that deliver piping hot heat at idle!
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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles 06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete 19 Honda CR-V EX 75k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife
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#6
10-27-2013, 04:54 PM
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That circuit has been thought to lead to in-dash fires. Maybe it's not properly fused. In any case, you pull over w/smoke coming out of the vents and watch your car get reduced to a scorched engine donor.
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CC: NSA All things are burning, know this and be released. 82 Benz 240 D, Kuan Yin 12 Ford Escape 4wd You're four times It's hard to more likely to concentrate on have an accident two things when you're on at the same time. a cell phone. www.kiva.org It's not like there's anything wrong with feeling good, is there?
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#7
10-27-2013, 04:59 PM
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On the first gen 126 and the 123's the aux pump potentially could do that. You would have the aux pump fail and draw current out of the climate control push button unit and then a fire occur.
A popular and recommended mod is to install a 1 amp fuse in line to the aux pump. I was told that this was fixed in the later iterations of the climate control system.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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