Strange electrical Raptor problem

[codabass]

I have 2019 ford raptor with 60,000 easy road miles. Never had an issue until a few weeks ago. When I turn on the interior electrical fan for the ac/vent or heater the dash 2x4, 4x4 hi low switch flashes on and off as does the indicator light next too the mph meter inside the dash. Even more strange the over head cabin switch go bright thwn dim in rythum with the fan motor. The truck toggles between 2x2 and 4x4 transfer and doesn’t know when to position itself. If I turn off the interior fan all suddenly remains calm and back to normal.

One shop couldn’t work on it because they didn't have the necessary computer so now I have an appointment with ford dealership in two weeks.

Can anyone help me? I greatly appreciate your expertise and advise. Thank you jim

 

[CleverGirl_]

I have 2019 ford raptor with 60,000 easy road miles. Never had an issue until a few weeks ago. When I turn on the interior electrical fan for the ac/vent or heater the dash 2x4, 4x4 hi low switch flashes on and off as does the indicator light next too the mph meter inside the dash. Even more strange the over head cabin switch go bright thwn dim in rythum with the fan motor. The truck toggles between 2x2 and 4x4 transfer and doesn’t know when to position itself. If I turn off the interior fan all suddenly remains calm and back to normal.

One shop couldn’t work on it because they didn't have the necessary computer so now I have an appointment with ford dealership in two weeks.

Can anyone help me? I greatly appreciate your expertise and advise. Thank you jim

Does it actually shift into 4X or is it just a light deal

 

[MurderedOutSVT]

Please post pics of said prius with electrical gremlin running amock

2x2 isn't a thing

 

[isis]

Check your battery voltage when it’s off and when it’s rpm’d up around 3k

 

[codabass]

Does it actually shift into 4X or is it just a light deal

No it doesn’t shift just lights up 2x4 then 4x4 and makes it hard to seer because it not shifting then staying put.

 

[codabass]

Check your battery voltage when it’s off and when it’s rpm’d up around 3k

This may sound like a newbee question because it is but where do i check the battery voltage? From the battery or alternator ? Thank you

 

[Nex]

Welcome to FRF. Please post pictures of said prius.

Anything aftermarket on the truck? Lights, stereo etc. It sounds like it's back feeding, looking for a good ground. @FordTechOne might be able to shine more light in it.

Check battery voltage. If it don't have a voltmeter or the knowledge then go to a parts store. They can test the battery and some can test the charging system as well.

 

[codabass]

Thank you. It shows (stock meter in truck) 13.5 volts then after 20 min up to 14 volts. When you turn it off it drops suddenly to 12 volts. ???

 

[Nex]

Thank you. It shows (stock meter in truck) 13.5 volts then after 20 min up to 14 volts. When you turn it off it drops suddenly to 12 volts. ???

That's normal, the alternator is not running. The 12v is battery voltage. Also that's not a load test of the charging system.

 

[codabass]

Copy i will take it in tomorrow morning for a load test. Thank you I really appreciate the advise and wisdom…jim