Lml fan clutch

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Barehandlineman

New member

• Jul 21, 2020

• #1

So my fan clutch is not grabbing second and third gear.. first noticed a/c wasn’t working when it got up over 90 replaced condenser and the fan clutch didn’t fix it. Then I pulled my toy hauler and on a long grade 90+ out I got up to 240 deg. No fan kicking in. Any ideas I know Lml is controlled via ecm. Truck is deleted and twinned, built trans and a bunch of other mods. All in truck performance tuned it anyone had this problem

 

Empty_Pockets

Undercover Epa agent

• Jul 21, 2020

• #2

Throw a hayden 2886 on there. What ive run on all mine and the ones i replace.

 

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Barehandlineman

New member

• Jul 21, 2020

• #3

For a Lml? Ecm controlled

 

Empty_Pockets

Undercover Epa agent

• Jul 21, 2020

• #4

I know i read that as lml the first time then thought lmm. I ran a hayden 3202 on my lml

 

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Barehandlineman

New member

• Jul 22, 2020

• #5

Problem is my fan clutch isn’t getting the voltage sent to it to turn it on.

 

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Barehandlineman

New member

• Jul 24, 2020

• #6

Nobody?

 

Empty_Pockets

Undercover Epa agent

• Jul 24, 2020

• #7

Check ground? Fuses and relays? Have you traced and checked for broken or chafed wires? I know the rubber under the shroud was loosening up and falling down causing issues with radiators rubbing pin holes in them. Could it have possibly rubbed a wire? Have you thrown a tech2 on it or similar scan tool?
Heres a cooling fan wiring diagram. Maybe it can help.

 

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Barehandlineman

New member

• Jul 25, 2020

• #8

Ya that all has been checked. Everything is good tech 2 can’t command it but I can send voltage to it through bypass and fan engages fine