Here's a picture of the electrical plugs that are used on the 911 engines with CIS fuel injection. I have to replace 3 of them and want to make sure I get the wireing (+/-) to them correctly. I have to assume that the + and - go to a specific side, right? I mean this thing only plugs in one way and if I cross the polarities I will short out the wiring and it will melt the ground wires (I've already had that happen once). After that mishap I replaced all of the effected wires and now I'm ready to try again. Question is, how to tell which side gets + and which gets - ?
Doug C
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QUOTE (DougC @ Oct 18 2005, 08:02 AM) |
Here's a picture of the electrical plugs that are used on the 911 engines with CIS fuel injection. I have to replace 3 of them and want to make sure I get the wireing (+/-) to them correctly. I have to assume that the + and - go to a specific side, right? I mean this thing only plugs in one way and if I cross the polarities I will short out the wiring and it will melt the ground wires (I've already had that happen once). After that mishap I replaced all of the effected wires and now I'm ready to try again. Question is, how to tell which side gets + and which gets - ? Doug C |
You melt ground wires by shorting them directly to a power source, which you might do by plugging them into the wrong thing
Yes, because the wires got attached to the electrical plug backwards the brown ground wire shorted out...that was my thinking anyway. Never the less I can't have anymore wires melting. This was the plug to the Air Meter that I'm talking about. It had a brown wire directly to the "D-" on the alternator and a brown/black wire that I hooked up to the powered spade from the car's original D-jet FI outlet on the relay board. When I did that and cranked the engine those two wires melted (all the way to the alternator). So, I assumed that I crossed those wires when I had replaced this plastic connector that had fallen off. I made sure that ALL effected wires were replaced.
BTW, you are right the plug looks just like a FI electrical plug.
Doug C
QUOTE (DougC @ Oct 18 2005, 10:55 AM) |
You melt ground wires by shorting them directly to a power source, which you might do by plugging them into the wrong thing Yes, because the wires got attached to the electrical plug backwards the brown ground wire shorted out... |
James, I'm printing that out as we speak, thanks!
Doug C
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