head unit installation issue?

220,000 MILES • 5.4L • V8 • 4WD • AUTOMATIC
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BJIRINEC
  • MEMBER
  • 1 POST
wired all up and my A/C fan won't work, and my light freaks out. has stock sub.
Aug 17, 2024 at 7:24 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Hi,

Have you first checked fuses for the blower motor? Also, which lights are acting odd? What are they doing?

First, check the fuses. I attached a pic below identifying three different ones for the blower motor to operate.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If they are all good and have power, I suspect you damaged a ground wire while working under the dash. If you look at pic 2 below, it shows a ground we need to check. It is G203. See pic for location.

Start with this and let me know what you find.

Joe

See pics below.
Aug 18, 2024 at 1:28 PM
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