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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 01-27-2014, 09:57 AM
jbwbhs jbwbhs is offline
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Location: central nc
 
Join Date: Dec 2011
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Mein Auto: '01 330
Can I cut and rejoin this wire?

Many thanks for all the good info here.
I'm chasing down a coolant leak that appears to come from under the intake. So, with 85,000 miles ('97 540, m62) I'm doing the valley pan, valve cover gaskets, etc,etc,. On drivers side bank, from the front of the wiring box above the injectors is a wire that runs, I believe to the alternator. From previous exp. I know I don't want to disconnect at the alt, and wonder what harm would be done to clip and restore that wire to allow swinging the box out of the way to access intake manifold. I have located oil level sensor and another on passenger side and think this wire is all that's left 5to give me clearance. Thanks in advance, again, great site.
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Old 01-27-2014, 10:26 AM
edjack edjack is online now
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Mein Auto: '97 540i 6 speed
I had two wires there. Cut them and reversed the flat spade connectors so they'd only go on one way.

Surprising that they didn't add a connector on these wires.
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Old 01-27-2014, 10:58 AM
jbwbhs jbwbhs is offline
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I think two wires is right, inside a cover. Thanks
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Old 01-27-2014, 12:37 PM
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Flug540 Flug540 is online now
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If you decide to cut, make sure you have a good connection after you rejoin them. I also decided to cut when I was doing a similar job and used a spliced connector to rejoin the wires. It was fine for a while, but with time the connection degraded and I had random battery light blinking which was driving me nuts.
Some time later I was replacing the alternator and found that disconnecting the cable isn't that bad actually. If you unbolt the motor mounts and jack the motor up you should have enough room to get to the connector.
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Last edited by Flug540; 01-27-2014 at 12:38 PM.
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