Overdrive light blinking
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Overdrive light blinking
Okay guys I have read many a different threads on many different sites but here's the rundown I have a 2000 Ford Excursion lifted with a V10 I was driving down the highway the overdrive light started flashing I took it to a transmission shop they had it for 3 weeks said there was nothing wrong with the transmission that it was a short somewhere. I got it back from the transmission shop after they had it for 3 weeks and drove it as a shop truck for about 3 days and could not get the number 19 PCM fuse to blow again. So yesterday on my way to my grandmother's funeral the overdrive light started blinking again and the PCM fuse blew again what I done was wiggled wiring in the column of the shop says they had checked for shorts in the steering column and supposedly on the back of the engine block. Now what I've read up on so far I know I should check for shorts and all three O2 sensors I know I should check for shorts or bare wires on the speed control sensor on the rear end and both speed control sensors at the front of the transmission and the back of the transmission I when I get home we'll check for steering column shorts again but aside from that any help would be greatly appreciated loop
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,730
Likes: 2,658
From: SE Florida
The first thing to do is read the codes so that you will know where to look for the short that is blowing the fuse. The places that read codes free CANNOT read these codes. You can use Forscan, a good independent shop, or a Ford dealer.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,730
Likes: 2,658
From: SE Florida
With that many codes, I suspect a damaged wiring harness. It may be near the transmission connector.
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Hotshot
Joined: Jan 2004
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From: St Louis
The blown fuse is what is causing all of those codes. You have to find the short circuit that is causing the fuse to blow.
BJB fuse F19 feeds circuit #391 (RD/YEL) feeds the transmission's actuators, the O2 sensor heaters, the EVR solenoid, CANP solenoid, & CANV solenoid. If you look up all of your fault codes, they correspond with the actuators/sensors.circuits that are missing power when the fuse is blown.
As Mark already indicated, you very likely have a damaged wiring harness. By far, the most common fault are the O2 sensor pigtails, often after exhaust, transmission, or O2 sensor work. The pigtails get up on the hot manifold, the insulation melts, and there's a short to ground on the heater circuit. Other previously noted failures include the harness getting on front half-shafts (4WD drive) or O2 sensors that are shorted internally.
As you indicated the Exc is lifted", I'd start with inspecting anything related to that as there's likely something "jacked up" as a result of that modification.
BJB fuse F19 feeds circuit #391 (RD/YEL) feeds the transmission's actuators, the O2 sensor heaters, the EVR solenoid, CANP solenoid, & CANV solenoid. If you look up all of your fault codes, they correspond with the actuators/sensors.circuits that are missing power when the fuse is blown.
As Mark already indicated, you very likely have a damaged wiring harness. By far, the most common fault are the O2 sensor pigtails, often after exhaust, transmission, or O2 sensor work. The pigtails get up on the hot manifold, the insulation melts, and there's a short to ground on the heater circuit. Other previously noted failures include the harness getting on front half-shafts (4WD drive) or O2 sensors that are shorted internally.
As you indicated the Exc is lifted", I'd start with inspecting anything related to that as there's likely something "jacked up" as a result of that modification.
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Okay guys well I'm going to start with the wiring for the O2 sensors and harness to the transmission I'm I lift kit that I installed on my Excursion was a rough country 10 inch suspension lift I will post updates I appreciate your help
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