Cluster diagnostic
Thread Starter
|
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
Cluster diagnostic
Would someone with a 2002 F250 check thier cluster diagnostics for me?
I have run throught the diag, but when it is supposed to light all of the bulbs, the batt light fails to illuminate. I just want to see if anyone else's doesn't.
I have run throught the diag, but when it is supposed to light all of the bulbs, the batt light fails to illuminate. I just want to see if anyone else's doesn't.
Fleet Mechanic
Joined: Aug 2005
Posts: 1,339
Likes: 5
From: NJ
The battery light should be on as soon as you turn the key on without starting the engine. The cluster test's do not affect the light is anyway (it will be on)
I'm not looking at a schematic but as far as I know the wire run's straight from the cluster to the alternator, there are harness connectors in between but there should be no modules involved.
Are you having some kind of problem? If you are then post back and maybe we can get to the bottom of it.
I'm not looking at a schematic but as far as I know the wire run's straight from the cluster to the alternator, there are harness connectors in between but there should be no modules involved.
Are you having some kind of problem? If you are then post back and maybe we can get to the bottom of it.
Thread Starter
|
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
By the way, I have replaced the Alt, VSM and Cluster. Ford programmed it all, and still no charge , no light and the door ajar is on (checked backwards and forwards, it has some goofy issue.)
Are you looking at an alt wiring diagram? I am hoping there is a plug somewhere between the cluster/GEM and the alt I can wiggle.
Are you looking at an alt wiring diagram? I am hoping there is a plug somewhere between the cluster/GEM and the alt I can wiggle.
Last edited by ReAX; Oct 4, 2006 at 06:36 PM.
Fleet Mechanic
Joined: Aug 2005
Posts: 1,339
Likes: 5
From: NJ
Unplug the field connector from the alternator and ground the green/red wire and see if the light comes on. If it does the alternator is not working, if it does not then the wire is faulty or you have no power to the bulb. I have seen the harness get damaged on a few Excursion's around the battery, you might start looking there.
Thread Starter
|
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
So both wires run over to the battery area, I imagine the field wire splits off at the last Tee before the ylw wire turns to fusabe links. I'll give it a try, thanks for the input.
Trending Topics
Thread Starter
|
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
The looming looks fine, but I have to pull the alt to get the pig tail out and pull the battery to get to harness. My optima is not leaking, what kind of damage have you seen? I will try again tomorrow when I have light and tools out.
The field wire does hold voltage for a while after the key goes off. KOEoff both wires in the pig tail have .03v short of battery voltage. It took 24hr for most of the voltage to die off on the field coil this weekend, I had just shy of .5v. Shouldn't the light be on with the KOEoff? The power should be connecting to gound to created a magnetic field and turning the light on. So why (other than blown bulbs which has been eliminated) would the light never turn on?
The field wire does hold voltage for a while after the key goes off. KOEoff both wires in the pig tail have .03v short of battery voltage. It took 24hr for most of the voltage to die off on the field coil this weekend, I had just shy of .5v. Shouldn't the light be on with the KOEoff? The power should be connecting to gound to created a magnetic field and turning the light on. So why (other than blown bulbs which has been eliminated) would the light never turn on?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Fleet Mechanic
Joined: Aug 2005
Posts: 1,339
Likes: 5
From: NJ
With the key on, you should have battery voltage at the Orange/ (sometimes Yellow/) wire. You should have a lower voltage (3-8volts) on the green/ wire as it pass's through the bulb. A failed regulator in the alternator can cause the light malfunction as well as a damaged wire. Check out the harness and let us know.
Thread Starter
|
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
Shorting the grn/red to gound does light the battery lamp, I then unshorted and the lamp went out.
Something to add though, I also disconected the ground to my warn winch. It has a solenoid to disconnect the hot lead, but with out the ground connected I have some funny stuff going on with the keep alive curcuit.
Update, never mind about the keep alive one door was open. However on my way home, the cluster said I had 13.6v. I am going to put the new alt back on and leave the winch disconnected to see what happens.
Something to add though, I also disconected the ground to my warn winch. It has a solenoid to disconnect the hot lead, but with out the ground connected I have some funny stuff going on with the keep alive curcuit.
Update, never mind about the keep alive one door was open. However on my way home, the cluster said I had 13.6v. I am going to put the new alt back on and leave the winch disconnected to see what happens.
Last edited by ReAX; Oct 5, 2006 at 04:50 PM. Reason: update
Thread Starter
|
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
Update.
Old alt will charge with all accy off, so it must have a blown diode. New alt is somehow dead where it will not light the lamp. The winch thing hasn't panned out, I put it back on after verifing the alt was putting out and everything still works. I am almost happy.
Old alt will charge with all accy off, so it must have a blown diode. New alt is somehow dead where it will not light the lamp. The winch thing hasn't panned out, I put it back on after verifing the alt was putting out and everything still works. I am almost happy.
Thread
Thread Starter
Forum
Replies
Last Post
Traildust
1999 - 2003 7.3L Power Stroke Diesel
2
May 18, 2014 03:48 PM
RIKIL
1987 - 1996 F150 & Larger F-Series Trucks
24
Mar 9, 2013 03:50 PM