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 Posted: Mon Jul 16, 2012 7:24 am |
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Joined: Feb 10, 2010
Posts: 1839
Trade Rating: +15
Location: Portsmouth
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Had a multimeter out and the passenger side dipped beam bulb in my morrettes has dropped to 6v? any ideas why this could be? bulbs work fine its definately the v drop which is causing my issue.
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Posted: Mon Jul 16, 2012 8:32 am |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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Poor connection
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Posted: Mon Jul 16, 2012 10:34 am |
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Joined: Feb 10, 2010
Posts: 1839
Trade Rating: +15
Location: Portsmouth
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| Lee wrote: |
| Poor connection |
It was fine then the volts just dropped? Would it be worth removing the headlight and then rewiring and fitting them?
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Posted: Mon Jul 16, 2012 11:10 am |
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Joined: Apr 14, 2010
Posts: 713
Trade Rating: +2
Location: Gothenburg, Sweden
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| jimjam19927 wrote: |
| Lee wrote: |
| Poor connection |
It was fine then the volts just dropped? Would it be worth removing the headlight and then rewiring and fitting them? |
How did you get the 6v - probes on the terminals that attach to the bulb?
If you measure between the [supposed] +12V feed and known good ground (like battery pole, as well as between the ground lead in the bulb connector and a known good you might be able to figure out if the problem is on the +12V feed or on the ground side...
You want 12V (~14 w/ engine running) on the feed and as close to 0 as possible on the ground (do the checks w/ light on, as the very low current from a multimeter most likely wouldn't cause much of a voltage drop over a bad connection of itself)
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| Silvermetallic 2004 206 RC | |
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Posted: Mon Jul 16, 2012 11:59 am |
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Joined: Feb 10, 2010
Posts: 1839
Trade Rating: +15
Location: Portsmouth
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| mtempsch wrote: |
| jimjam19927 wrote: |
| Lee wrote: |
| Poor connection |
It was fine then the volts just dropped? Would it be worth removing the headlight and then rewiring and fitting them? |
How did you get the 6v - probes on the terminals that attach to the bulb?
If you measure between the [supposed] +12V feed and known good ground (like battery pole, as well as between the ground lead in the bulb connector and a known good you might be able to figure out if the problem is on the +12V feed or on the ground side...
You want 12V (~14 w/ engine running) on the feed and as close to 0 as possible on the ground (do the checks w/ light on, as the very low current from a multimeter most likely wouldn't cause much of a voltage drop over a bad connection of itself) |
Thanks will give this a shot. All the other bulbs are working fine and functions proper like flashing etc.
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