Quote:
Originally Posted by macdoe
We managed to hook the battery charger to each pump and they both run. I guess it is time to do a current draw test. I need to find out how to do this and what the specs are for these pumps. They are both Bosch....one is part#0 580 254 950
014 made in Germany
688040021
The other is part#0 580 254 950
014 made in Germany
688070009
Car is 1988 420sel
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Both pumps are the same, the 688070009 ish number is a date code or something like that. No idea what 014 is.
The pump will have a low amp draw if you test out of car since it isn't pushing against anything.
Do a amp draw test when everything is put back together, they should have about the same draw. Pumps generally fail in a no run mode, sometimes they shear the coupling between the motor and pumping element. In that case the amp draw will be low and motor speed fast.