NO CRUISING!

Reply Subscribe

Thread Tools

Search this Thread

Feb 8, 2021 | 12:18 PM

Dane Snyder

Thread Starter

4wd Low

Joined: Feb 2021

Posts: 12

Likes: 0

NO CRUISING!

Ok, so my cruise control would be rolling along and just cut out.
Sometimes, I could hit RESUME and it would kick back in.
Sometimes, I could press RESUME or SET over and over and it would eventually engage.
Well, it finally stopped engaging completely. No indicator light or anything. I've tried the self-diagnostic, but it won't enter that mode at all. The deactivator switch on my master cylinder is good. I'm getting power to it as well. Any ideas?
2000 All original. 2WD 5.4L (Don't laugh.)

Feb 8, 2021 | 12:40 PM

projectSHO89

Hotshot

Joined: Jan 2004

Posts: 19,768

Likes: 1,082

From: St Louis

Quote:

The deactivator switch on my master cylinder is good

Yeah, I wouldn't bet on that, it's an extremely high failure rate part, especially if it hasn't already been replaced in the last few years. You can unplug the main harness connector from it (or the recall harness, if present) and install a jumper to test to see if the system works with it bypassed.

Feb 8, 2021 | 01:04 PM

Daneman

Junior User

Joined: Apr 2019

Posts: 57

Likes: 1

I would bet on it.

Feb 8, 2021 | 01:12 PM

Dane Snyder

Thread Starter

4wd Low

Joined: Feb 2021

Posts: 12

Likes: 0

Well, the deactivator switch is an NC switch. With an ohmmeter connected, it shows a closed circuit, so that checks out. Stepping on the pedal shows an open circuit.
What am I missing?

Feb 9, 2021 | 07:58 AM

carbon coupe

Fleet Mechanic

Joined: Oct 2010

Posts: 1,997

Likes: 206

From: South Eastern Michigan

Was the cruise recall done on the vehicle? Is the wire harness intact? Clockspring? Dirty switches in the steering wheel? Can a 5.4L really move that much weight?