75 450 sl manifold pressure sensor wiring - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 04-05-2012, 06:17 PM Thread Starter
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75 450 sl manifold pressure sensor wiring

HELP!!! The manifold pressure sensor is good but the wires have fallen off of the plug.
I cannot figure out which wire goes to what hole. I know on the part itself it has numbers 7-8-10-15. The wires are colored but are old very old. And it is hard to tell on 2 of the wires if they are brown/white or green/white all the wires look a bit brown the other 2 wires are browm/blue and brown/red. I would like to know if they sale just the wires contected to the white plug that attaches to the manifold pressure sensor? My car was running great til 1 of the wires fell out. And then I went to fix it and the others just crumbled out!
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post #2 of 6 (permalink) Old 04-05-2012, 08:45 PM
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post #3 of 6 (permalink) Old 04-06-2012, 08:26 AM
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post #4 of 6 (permalink) Old 04-06-2012, 02:36 PM Thread Starter
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thank you.. but our wires are not those colors! We have called all over trying to buy the wire harness for this darn part. No one seems to have it! So does anyone know what wires we can use to fix this. I dont want to have to go buy the whole darn part for 1300. bucks just to have the wires thats for sure!
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post #5 of 6 (permalink) Old 04-06-2012, 08:54 PM
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To narrow which pair are which, 2 wires together should be 90 ohms and then check the resistance of the remaining 2 which should be 350 ohms. The ones that register 90 ohms are #7 and #15, the 350 ohm reading will be #8 and #10. Up to you to figure the rest.

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post #6 of 6 (permalink) Old 04-07-2012, 06:32 AM Thread Starter
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thank You so much!
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