Author Topic: alt light at idle  (Read 5270 times)

January 05, 2014, 08:28:06 am

bbob203

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alt light at idle
« on: January 05, 2014, 08:28:06 am »
When my MK2 is idling the charging system dashlight is on. Sometimes when I come to a stop and it will take a second but it will come on then I'll drive off and it goes away. The regulator is newish and showed some corrosion so i cleaned that off god and put dielectric bulb grease on it didn't change anything..
92 Passat wagon M-TDi
03 Jetta wagon TDi
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Reply #1January 05, 2014, 09:04:45 am

air-cooled or diesel

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Re: alt light at idle
« Reply #1 on: January 05, 2014, 09:04:45 am »
a glowing light at idle is normal(at night), take a multi-meter and check charge voltage at idle.
if light is brighter than glowing check battery, connections/cables(and grounds), check voltage of battery, key off, and voltage at idle and at higher revs(around 2000rpm). check voltage drop and at grounds too.
could be a faulty regulator.?

Reply #2January 07, 2014, 11:53:53 am

fatmobile

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Re: alt light at idle
« Reply #2 on: January 07, 2014, 11:53:53 am »
 Does it still do it with your headlights on,.. with a load?
Tornado red, '91 Golf 4 door, with M-TDI 12mm pump, south bend clutch, VNT-15 turbo, 02A trany
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'84 GTI with stock 1.6TD starion intercooler.

Reply #3January 07, 2014, 12:01:34 pm

bbob203

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Re: alt light at idle
« Reply #3 on: January 07, 2014, 12:01:34 pm »
less bright and the brights even less.
92 Passat wagon M-TDi
03 Jetta wagon TDi
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Reply #4January 07, 2014, 12:23:01 pm

ORCoaster

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Re: alt light at idle
« Reply #4 on: January 07, 2014, 12:23:01 pm »
When my alt light flickers at idle it only takes a small load, like opening the door or touching the brakes to make it go out. 

Reply #5January 07, 2014, 03:58:02 pm

bbob203

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Re: alt light at idle
« Reply #5 on: January 07, 2014, 03:58:02 pm »
The exciter wire female spade terminal was about disconnected from the exciter wire 1 or 2 braids still making contact with the spade coupled with a super rusty D+ terminal on the alt new female space cleaned of the rust and some di electric grease and its good to go no more dim light. ;D
92 Passat wagon M-TDi
03 Jetta wagon TDi
VE Timing tools for rent
Need a car transported a long distance? Pm me for details.

Reply #6January 07, 2014, 09:30:51 pm

8v-of-fury!

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Re: alt light at idle
« Reply #6 on: January 07, 2014, 09:30:51 pm »
I have a dim light with perfect connections.. only with no load on the alt though.