[Dieselwrencher]

Originally Posted by Ackattack

Relay timer? You got details on this. Right now I have my grid heaters on a switch, but a timer setup would be nice.

While we're on this topic, is the temp sensor in the intake a switch or sensor and the ECM normally cycles the heaters?

With the timer relay you won't need the intake temp sensor. See below.

Originally Posted by ryanroo

the ecm cycles them. depending on what the IAT says it will cycle them more or less during warm up. i think. im sure it helps but i think once its running there really isnt a point to continue cycling them. once ryan figures this timer thing out im going to pirate his idea as well.

Yes, Ryan is correct. The ECM or PCM in a 12v's case, controls the grid heaters. It will cycle them when the intake air temp is below a certain parameter until the parameter is met. Once that temp is met the ECM cuts out operation to the grid heater solenoids until the next key cycle.

I was helping another member with questions on his 05 12v conversion and we got talking about grid heater controls. I told him I was looking for an inexpensive way to put a timer switch on them without spending big money for a glow plug controller from an older diesel truck. Well, he found this:

http://cgi.ebay.com/ws/eBayISAPI.dll...m=141128573998

I purchased 2 and haven't put one on yet. He has had his installed for about 3-4 weeks and it works great. It is wired goofy as it applies grounds instead of power, but it will work. It is an adjustable relay as well.