Re: Short cycle on glow plug circuit
Posted: Sun May 09, 2010 1:04 am
the glow plugs are wired in parallel and get 12v for the initial hit then 6v though the step down module that is right next to the glow plug relay. I posted a get repost with diagrams a couple times but atm I'm not gong to take the time to find it and post it again :) there are also I couple of different systems I believe so this can complicate the internet diagnosis.Adrock wrote:If the glow plugs are 6 volt I would assume 2 are wired in series, (or does the controller divide the voltage and run them all parallel?) If wired in series, and one is shorting it will not drop 6 volts across each but rather 12 across the one remaining with resistance. Meaning it will heat up 4 times faster, and if your temp sensor is in that neighbourhood, it will function correctly. Again I am assuming the temp sensor measures temperature from one location rather than at all the glow plugs, and may be wrong.