If the test tells you that 12v should be present between 2 pins and 12v is no present then jumping them won't do anything because the power to do whatever you were trying to do isn't there. You need to find why 12v is not present.
-Curt Date: Sat, 27 Jul 2013 14:49:05 -0500 From: "Kaleb C. Striplin" <ka...@striplin.net> To: Mercedes Discussion List <mercedes@okiebenz.com>, davesl...@okiebenz.com Subject: [MBZ] More ac Message-ID: <5abca659-71f5-4a87-b27b-3555cf1c7...@striplin.net> Content-Type: text/plain; charset=us-ascii In about to set this 95 e300 on fire. All tests point to bad pbu, yet I would think if by my figuring you jump pin 7 and 13 on the left harness in the car compressor should kick on, it doesn't. I get about .6 volts at those connection as same as I get at the pressure switch. If I put positive at pin 13 which goes to fuse 7 and run a wire wire direct to ground I get 12v. If ground plug in the pressure switch on the Klima side of the switch compressor kicks on. If I have the switch hooked up and ground pin 7 in the car with a wire running direct to ground compressor kicks on. I have tested continuity between all wires the one from pin 7 in car to pressure switch, it's fine, from other side of pressure switch to pin 10 on Klima it's fine, from pin 1 on Klima to ground it's fine. That seems to be all the legs of the circuit right? Maybe I need to test from pin 13 to fuse 7 in the fuse box? Seems with positive of meter on pin 13 and neg to ground and I get 12v that would indicate that wire is fine too, right? What piece of the puzzle am I not getting. If all these wires seems to be fine then why won't compressor kick on if pin 13 at pbu harness which comes from fuse 7 is jumped to pin 7 which goes out to the pressur switch then on to the Klima why won't that kick on the compressor? Maybe my limited electrical ability is confusing me? Or is there more to the pbu kicking on the compressor that that? Would the wires seem to test fine but still be bad or shorted or something? Sent from my iPhone _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
