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2000 Ford F150 Keeps Blowing Fuses, Service engine soon light is on

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2000 Ford F150 Keeps Blowing Fuses, Service engine soon light is on

 
  #1  
Old 10-21-2010, 08:50 PM
kg0306
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2000 Ford F150 Keeps Blowing Fuses, Service engine soon light is on

My Truck keeps blowing fuse #23 and the Overdrive light is blinking also the check engine light is on. Also engine is shuttering when im accelerating and it wants to stall out When I was trying to diagnose it the first time i found out the circuit was most of the sensors for the engine. Wondering if anybody has had problems like this and have any ideas of where to keep looking
 
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Old 10-21-2010, 11:13 PM
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Did you check for codes in the computer?
The code should help you track down the problem.
 
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Old 10-22-2010, 03:58 AM
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No need to check codes.

F23 blowing is usually due to an O2 sensor harness laying on the exhaust or against a front half shaft (if 4X4) causing the heater power circuit to short out and blowing the fuse.

The same fuse also supplies operating power to the solenoids in the transmission. When blown, you'll also get a transmission that doesn't work right along with a flashing OD light.
 
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Old 10-23-2010, 09:14 AM
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Thank You still have to check my codes and its a 2wd and I have checked the O2 sensors and havent found any short around them?
 
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Old 10-23-2010, 07:12 PM
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I have the following codes being tripped: P0340, P1747, P0750, P0755, P0743,P0443,
P1451, P0135, P0155, P1409, P0141, P0161
 
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Old 10-23-2010, 07:47 PM
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WOW,,,,that's a bunch.

Here ya go. Start looking them up.
Ford DTC Codes
 
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Old 10-24-2010, 07:44 AM
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You'll get all those codes as a result of the blown fuse. Don't waste time screwing around and trying to chase codes that have a clear-cut origin (loss of operating power). Fuse F23 provides operating power to several solenoids and valves under the hood (including tranny solenoids) and provides heater power for all four O2 sensors. Only the P0340 fault might be caused by other concerns.

You have to find your short-circuit so the fuse doesn't blow!

In addition to the aforementioned sensor harnesses, there have been reports of harness bundles rubbing against brackets up on the engine and shorting out. You'll probably have to go over the whole harness until you find the fault. This circuit is identified by RED/YEL and VIO/WHT wires under the hood.
 
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Old 10-24-2010, 10:40 AM
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Definetly what project sho is saying, uncle had a 98 f150 that had the engine replaced, and apparently they left a bundle of wires hanging and it rubbed against frame and caused all types of codes like urs and would blow that fuse. This bundle was behind the engine and hard to see. Apparently the big known famous shop here in houston, had done alot of these trucks and did the same thing to alot of them, just left the harnes loose and all had these problems.
 
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Old 10-24-2010, 01:01 PM
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Thank you as soon as i find the problem i will let you guys know what i find.
 
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Old 11-17-2010, 08:00 PM
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I finnally got time to fix it and I found that the wires were rubbed through on the back of the engine as Krane Operator said. Just repaired the harness and put it back in and everything seems to be working fine!!!
 
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Old 01-08-2011, 01:03 AM
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Same problem but compounded I guess...

I had almost all the same codes except for the P0340 in my 2003 F250 4WD 5.4. Happened a couple of months ago and I replaced the solenoid pack. Everything was fine until a couple of days ago when I was driving along and all of a sudden the problem returned. Blown fuse 23, O/D light flashing, all same codes again. Read this thread and had a go at the harness wiring. At the back of the block I found one of the wires to the pass side O2 sensor broken and it was literally rubbing against a bracket attached to the rear of the engine. Had to unattatch the harness from the left side of the engine to be able to pull it around enough to have enough slack in the wires to repair the broken wire. Repaired the wire and I figured everything would be good. Not! Dunno what's wrong but I still have the same problem!

Do you think it's possible that having that wire shorting out like that could have burned out the solenoid pack or an oxygen sensor? Or any other ideas?

Terry
 
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Old 01-08-2011, 10:59 PM
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Hey I recently found my problem like terry said it was a short on the rear of the engine block where the heat from the engine had melted through the harness and shorted out on the block. I took out the harness and repaired it there was a few wires that were burnt. It has seemed to fix my problems so far!
 
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Old 01-19-2011, 09:16 AM
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Looks like it's finally fixed. The repair of the broken wire as stated WAS the actual cause of the problem as Sho said. The further problem I found that I somehow missed was another blown fuse. It was the one right below #23. Once I replaced that fuse and cleared the codes, all seems to be right with the truck now.

So my thanks to ProjectSHO89 for that information!

Terry Sumner
 
 
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