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Old 09-26-2006, 06:36 PM
pdxwaker pdxwaker is offline
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Join Date: Sep 2003
Location: Portland, OR
Posts: 279
Quote:
Originally Posted by diametricalbenz View Post
If the glow plugs are changed to fast glow then will it interfere with the indicator loop glow plug on the dashboard? Aren't they different voltages?
I removed the loop and shorted it with a short piece of 12ga Romex copper wire (solid wire, not stranded). I'm only getting ~9V at the plugs when cycling... I'm thinking there is a big I-R drop from the battery, through the dash switch, through the shorted glow indicator, and to the glow plugs. I have a relay that I salvaged from a 300sd and will be installing this soon... it will be triggered by the output of the starter knob (which used to drive the glow plugs directly).

Power is a V^2 relation so I figure going from ~9V to ~11.5V will give me a ~60% increase in power (and heat) at the plugs...

Regardless, yeah, the indicator function goes away and without the relay it is a pain to determine if you have any open glow plugs (they aren't isolated from one another).
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1985 MBZ 300DT
1969 MBZ 220d
1984 MBZ 300TDT
1981 VW Vanagon
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