Burned wire harness why?

[amcink]

OK, so I did a headgasket replacement put everything back together, car was cranking and turning but no starting (it did once for about 3 seconds) then found out that the fuel pump was not starting then change the fuel pump relay with a new one.
However prior changing the fuel pump relay I took the relay next to the fuel pump out and made the mistake of trying to start then realise and put the relay back and the new one and I had this continuous beep in the car. Since the battery was also low I connected a charger and the beep went away, then I started the car and the harness started to burn and I stopped immediately as you can see it burned and I will need a new harness but want to know if I plugged something wrong. Also I'm sure I will need a fuel pump since I did not heard the pump coming on, on this last try

[Shellback]

classic swapped relay with incorrect relay = melted ground. A few of us in this forum have performed this "mod". My advice, get a new wire harness from a salvaged M44

[amcink]

Originally Posted by Shellback

classic swapped relay with incorrect relay = melted ground. A few of us in this forum have performed this "mod". My advice, get a new wire harness from a salvaged M44

Shellback
Thank you for the response; however is it just because I messed up on swapping the wrong relay? I just want to make sure I understand it to avoid it in the future.

I was thinking of just replacing the burned wires or is it a bad idea?

[diegokiill]

What's that thing near the airbox? My car doesn't have it.



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[xxxJohnBoyxxx]

Originally Posted by diegokiill

What's that thing near the airbox? My car doesn't have it.



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Traction control or cruise control motor with cable.

[TobyB]

Cruise control...

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