2000 Excursion flashing OD light and Beeps
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Senior User
Joined: Jul 2007
Posts: 173
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From: Holland, Michigan
2000 Excursion flashing OD light and Beeps
I am having some issues with my '00 7.3 excursion. The overdrive light is flashing and there is 5 audible beeps to follow. I just changed the VSS with a motorcraft one and after I clear the codes then take it on short drive the light flashes again (I have cleared it and drove it 3 times with the light still flashing). The check engine light comes on as well reading P0500. The speedometer is functioning normally and the trans is shifting fine. Also there is no abs light on and the breaks feel fine. Hopefully someone has had this same issue with a solution.... I appreciate anyone's solutions/troubleshooting. Thanks!
Cargo Master
Joined: May 2010
Posts: 3,047
Likes: 10
From: Snohomish, WA
You are having two separate issues.
The OD light can be caused by several things including what you mentioned. When the OD light flashes you will have codes stored. P0500 can be related to more than just the VSS.
The five beeps is the Airbag light being burnt out. When you turn the key on, I'll bet you don't have an airbag (SRS) light right? The five beeps of five is an audible warning so you know there is an issue.
The OD light can be caused by several things including what you mentioned. When the OD light flashes you will have codes stored. P0500 can be related to more than just the VSS.
The five beeps is the Airbag light being burnt out. When you turn the key on, I'll bet you don't have an airbag (SRS) light right? The five beeps of five is an audible warning so you know there is an issue.
Postmaster
Joined: Dec 2010
Posts: 2,951
Likes: 4
From: Gary,Indiana
You are having two separate issues.
The OD light can be caused by several things including what you mentioned. When the OD light flashes you will have codes stored. P0500 can be related to more than just the VSS.
The five beeps is the Airbag light being burnt out. When you turn the key on, I'll bet you don't have an airbag (SRS) light right? The five beeps of five is an audible warning so you know there is an issue.
The OD light can be caused by several things including what you mentioned. When the OD light flashes you will have codes stored. P0500 can be related to more than just the VSS.
The five beeps is the Airbag light being burnt out. When you turn the key on, I'll bet you don't have an airbag (SRS) light right? The five beeps of five is an audible warning so you know there is an issue.
Now as far as the OD light flashing I was having an issue with mine flashing changed VSS and it still came on but would go away. It came and went. Well I just got around to tearing the trans down and found the OD return spring retainer ring was off and center support is junk. But the funny thing was it was still shifting Ok but sometimes it shuttered. So what I think was going on was as the coast clutch drum was moving all around and the forward VSS won't pick up a signal sometimes. Actually I have no idea what the deal was. So I hope this isn't the case for you Derek.
So hopefully Ken you can give us a little more on the P0500
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
P0500 Possible causes:
Open in VSS (+)/VSS (-) harness circuit.
Short to GND or SIG RTN in VSS (+)/VSS (-) harness circuit.
Short to PWR in VSS (+)/VSS (-) harness circuit.
Damaged VSS.
Damaged PCM.
Here is a link to the diagnostic procedures: http://sdrv.ms/JuI9em
Open in VSS (+)/VSS (-) harness circuit.
Short to GND or SIG RTN in VSS (+)/VSS (-) harness circuit.
Short to PWR in VSS (+)/VSS (-) harness circuit.
Damaged VSS.
Damaged PCM.
Here is a link to the diagnostic procedures: http://sdrv.ms/JuI9em
Postmaster
Joined: Dec 2010
Posts: 2,951
Likes: 4
From: Gary,Indiana
So then the forward is the TSS and rear is the VSS. See I was thinking it was the other way around...DA 
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
Likes: 2,642
From: SE Florida
The front sensor in the trans is the TSS (Turbine Speed Sensor.) The sensor on the rear of the transmission is the OSS (Output Speed Sensor.) The sensor on the rear axle is the VSS (Vehicle Speed Sensor.)
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