6.7 Cummins intake heater relay

Replacing intake heater relay on my 2015 Cummins 6.7 Laramie.

[@spudth]

Logically, if this relay is bad it will either not come on when voltage(or ground) is applied to one of the smaller terminals or if it has arced too much internally, it will not pass power when turned on. I believe the small terminals that control it one is constant battery voltage the other goes to the PCM and applies ground to activate it. Use a monitor like AlfaOBD to see when it's commanded on.

[@dannyv4191]

From the small 2 cables, where is constant voltage connected to the right or left side of the relay?

[@BoundANDDetermined88]

So, what determined that the Intake heater relay needed to be changed out? Was there a check engine light on? What code was being generated?

[@pnwishland4075]

What code did your truck pull to determine that was the issue?

[@WilliamRoss-v5i]

Where does the larger black wire go on the 2 main bolts negative term on battery? One is red to battery what’s the other? Mine has nothing on the black side

[@ren5629]

how did you determine that the solenoid/heater relay was defective? I have a p0542 code

[@cfudge24]

Buddy of mine said to try that first and see if it fixed the issue.

[@elvatocavron1118]

@@cfudge24 did it?

[@loganholmes]

You can check if the solenoid/relay is good with a multi meter. You will have constant power on one side, and no power on the other. Then get someone to turn key, and see if the voltage passes through. If it does not your solenoid/relay is bad and needs to be replaced. PS. hearing the relay click DOES NOT mean it passes voltage

[@erictittle7531]

what code(s) were you throwing?

[@austenazevedo6078]

Did this fix it? Were you throwing p2609

[@SSYoung125]

Simple enough thank you

[@derickmiller1161]

We’re does the red cable wire go to

[@georgeramsey2827]

Red cable goes to pos terminal at the battery.

[@FuttBucker6]

This is a useless video

[@cfudge24]

But you watched it 😆

[@WilliamRoss-v5i]

Where does the larger black wire go on the 2 main bolts negative term on battery? One is red to battery what’s the other? Mine has nothing on the black side