Voltage regulator

CHJ

MEMBER
2009 FORD F-150
4.6L
V8
4WD
AUTOMATIC
180,000 MILES

Alternator went out on truck so I changed it. Voltage regulator not doing what it is supposed to do on new alternator. Had same thing happen on my Nissan and y'all told me to check some fuses. I am wanting to know which fuses I need to check on this one. Thanks

Saturday, October 27th, 2018 AT 10:22 AM

4 Replies

CJ MEDEVAC

MECHANIC
11,004 POSTS

I made a screenshot (2 to get it all) of the charging circuit. Click on them below.

Your fuse is labeled at the top.

Many folks overlook or don't realize that there are fusible links in the equation too, so you might see if they might also be the break in your system.

Let us know how it goes.

The Medic

Images (Click to make bigger)

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Sunday, October 28th, 2018 AT 2:49 PM

CHJ

MEMBER
12 POSTS

I was talking about fuses in the fusebox under hood and under dash

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Sunday, October 28th, 2018 AT 3:22 PM

CHJ

MEMBER
12 POSTS

Where are fuses c d & e?

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Sunday, October 28th, 2018 AT 3:24 PM

CJ MEDEVAC

MECHANIC
11,004 POSTS

Fuse 29 is in the smart junction box (rear kick panel)

The fusible links are on the wires they are labeled on

Fusible links are wires themselves, they just burn into when overloaded.

Look for bubbly insulation, wire burned into, or a wire that the insulation stretches out like a rubber band. If you replace one, get one with the same load values.

The Medic

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Sunday, October 28th, 2018 AT 4:40 PM