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hello, im new here, so hopefully im doing this right. i have a 2000 s500 which just had about 3 modules and some fuse boxes replaced.. (ream sam module,tcm module, etc) the car starts,and i am able to shift gearss. but car is low on all sides. i installed a new air pump, fuse, and relay, and the pump is still not getting power. if i hook up the pump to a external power soure, it works fine. any clues to why the pump is still not getting any power?
 
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