PCM of NC efan wiring...

Reply Subscribe

Thread Tools

Search this Thread

12-17-2023, 01:07 PM

Bluecollar Hotrods

10 Second Club

Thread Starter

iTrader: (18)

Join Date: Mar 2002

Location: FL

Posts: 2,062

Likes: 201

Received 55 Likes on 44 Posts

PCM of NC efan wiring...

It's been on my truck an functional for several years. Suddenly, high speed fans aren't kicking on. And when the low speed fans run, I have one of my relays clicking non stop. I was told to check my grounds, they're all tight. I cleaned any that looked even slightly suspect. Same condition. Not a real concern right now as it's winter, but once the weather gets warmer I am certain that I'll have overheating issues. Next step? I'm seriously about to install an 05+ OEM radiator, fans, and harness.

Reply Like

12-17-2023, 05:31 PM

1FastBrick

Custm2500's Rude Friend

iTrader: (17)

Join Date: Apr 2007

Location: JunkYard

Posts: 14,326

Likes: 90

Received 761 Likes on 630 Posts

Have you tried relays just to be sure?
Have you inspected the plugs for corrosion or melted sockets?

Reply Like

The following users liked this post:

Bluecollar Hotrods (12-18-2023)

12-18-2023, 02:43 PM

Bluecollar Hotrods

10 Second Club

Thread Starter

iTrader: (18)

Join Date: Mar 2002

Location: FL

Posts: 2,062

Likes: 201

Received 55 Likes on 44 Posts

Quote:

Originally Posted by 1FastBrick

Have you tried relays just to be sure?
Have you inspected the plugs for corrosion or melted sockets?

Not yet, that will be my next group of things to look over more thoroughly.

Reply Like

12-20-2023, 11:58 AM

BigKID

TECH Veteran

iTrader: (5)

Join Date: Dec 2001

Location: Panama City, Fl

Posts: 4,839

Likes: 9

Received 134 Likes on 89 Posts

If the relay is chattering, check the signal circuit (pins85/86). If the +12V and ground on those pins are good, the windings in the relay could be going bad.