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cmns2500

P0380

7 posts in this topic

so i know it's a code for one of the relays for the grid heater....my question is, where is said relay, where do i find a new one, and how much will i be out?i think my grid heater comes on at idle now no matter what the outside temp is...and this causes my truck to sound like it has a lope...and my scan gauge will say my IAT's are up over like 110 degrees if i idle for like 10 mins on a somewhat warm day....so my choices are to either get the new relay and fix the problem, or do the lazy thing and unplug the grids for good till next winter...haha what do y'all think i should do?

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well...it sounds like you know what to do....just a matter of "if money allows"

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yup...which is why i ask how much the relay would cost

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Just follow the wire hooked to the positive cable on the drivers side. Don't know what the cost is.

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They are under the drivers side battery, in front of it kinda. You will see the two relays with 1 wire on each relay the same size as the ones going to the grid, there is also 2 more wires that are tiny going to each relay. If you are having trouble, unhook the green wire on each relay, then they won't be able to energize until you get everything fixed.Theres mine with a the positive side unplugged.

post-45-138698163358_thumb.jpg

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ooooooh, THOSE things are the relays?? i figured they may be in the fusebox under the hood...thanks for the pic man...i think i'll just un hook em from the battery later this week...it's kinda sorta cold out here right now(like upper 40's :lol:) so i'll wait a while and un hook, and in the summer find the bad relay

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Yeah those are them. Yours might be a little cleaner, less rusty, shinier :lol:

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