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Central Vacuum Locking System - W140
My '92 300SD (W140) appears to have a problem with the central locking system. The fuse box in the trunk, circuit 11 has a blown 20 A fuse. I replaced it and it immediately blew again. This circuit is for the central locking system and misc lighting.
Is it possible that a short circuit is now causing the fuse to blow or is it more likely that the central locking system pump is locked and over amping the circuit.? Before I buy a new pump (if needed) and I dissect the car in search of the culprit, I thought I would ask the experience of the forum. If inspection is required of the pump, which I believe is located under the back rear seat, I could use some advice on the rear seat removal as this seat is fastened to the body in a different manner then the usual two clips located at the base of the seat. A checkout procedure etc. would be greatly appreciated. Thanks, Sail42 1992 300SD/500SD - 95K 1994 S350 - 92K Previously owned 1987 300D - 225K 1985 300D - 387K 1979 450SEL 225K |
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I would just disconnect the pump and replace the fuse and see if it blows again. That will tell you if the pump is over amping the circuit. I would take the pump apart as much as you can to see if it is something simple. Could be fun/educational as well. I was one of the kids that took all his toys apart!
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Currently 1991 Mazda Miata 174000 1991 Subaru 189,000 Winter beater got rid of: 1984 VW Vanagon 195,000 1976 350SE Euro 185,000 KM 1973 280SE 4.5 (boy do I regret that) 1980 280SE European W126 4 speed manual (miss it) 1989 BMW 735iL 119000 (good riddance) |
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