4x4 won't engage
Thread Starter
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Junior Member
Joined: Mar 2000
Posts: 3
Likes: 0
From: MO, USA
4x4 won't engage
can anyone tell me what the pink and blue wire that runs on the passenger side of the engine above the transfer case are? I ssupect they are the leads to lock the front hubs/axle in to 4 wheel drive. I've been having a problem with it shiifting in when it's cold, but got my truck stuck this morning when I though it was engaged, when I got back home and had time to look, I found these two wires loose under the truck. They have crimped spots in them, so I'm sure they came out of a plug. Any help would be greatly appreciated!!
Senior Member
Joined: Oct 2000
Posts: 199
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From: Austin, TX, USA
The system is a vacuum engage type, so if it's cold, the air pressure will be lower, probably low enough to not be able to fully lock the wheels. I think this is generally a problem with 4x4's in cold weather. Sorry to give a crappy answer, but from everything I've read and heard, that's about all that's been said.
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2000 Silver F-150 XL Sport
Reg. Cab, Reg. Bed, 4.2L V6, 5-speed, 4x2
mods:
Tailgate lock, Generic bedliner
285/75r16 BFG AT ko (33.1x11.4)
Sony CD player, Blaunpunkt 5.25" speakers
Crimeguard alarm, Power locks
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Never let your schooling interfere with your education --Mark Twain
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2000 Silver F-150 XL Sport
Reg. Cab, Reg. Bed, 4.2L V6, 5-speed, 4x2
mods:
Tailgate lock, Generic bedliner
285/75r16 BFG AT ko (33.1x11.4)
Sony CD player, Blaunpunkt 5.25" speakers
Crimeguard alarm, Power locks
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Never let your schooling interfere with your education --Mark Twain
Senior Member
Joined: Jan 1999
Posts: 1,327
Likes: 2
From: OK
Assuming you have ESOF-
Like r0land said; the hubs are vacuum operated . However, I've never had a "cold-weather" problem on either vehicle. The wires could lead to the motor that engages the transfer case. If no one knows, you may have to do some more diags.
When you find the problem, be sure to let us know how to fix it.
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1997 4x4 Expedition- 4.6L, true dual exhaust w/Ravin DI/DO, K&N air filter, SuperChip, airbox mods, Edelbrock shocks, 285/75R16 BFG ATs, 2000 F150 "XLT" wheels, 4.10 gears, Auburn LS, Clarion In-dash CD player, Smitty Bilt push bars and nerf bars.
2000 4x4 F250 SD XLT SuperCab SWB- 6.8L, Offroad Pkg, Camper Pkg, 4.30LS, Tape & CD player, Remote Keyless Entry, Sliding back glass, tinted windows, 265/75R16 OWL tires, Smittybilt nerf bars & Line-X bedliner.
NoMo's site
Like r0land said; the hubs are vacuum operated . However, I've never had a "cold-weather" problem on either vehicle. The wires could lead to the motor that engages the transfer case. If no one knows, you may have to do some more diags.
When you find the problem, be sure to let us know how to fix it.
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1997 4x4 Expedition- 4.6L, true dual exhaust w/Ravin DI/DO, K&N air filter, SuperChip, airbox mods, Edelbrock shocks, 285/75R16 BFG ATs, 2000 F150 "XLT" wheels, 4.10 gears, Auburn LS, Clarion In-dash CD player, Smitty Bilt push bars and nerf bars.
2000 4x4 F250 SD XLT SuperCab SWB- 6.8L, Offroad Pkg, Camper Pkg, 4.30LS, Tape & CD player, Remote Keyless Entry, Sliding back glass, tinted windows, 265/75R16 OWL tires, Smittybilt nerf bars & Line-X bedliner.
NoMo's site
Senior Member
Joined: Nov 1999
Posts: 121
Likes: 0
From: Nashville,TN USA
They're not wires. They're plastic vacuum lines that engage and disengage the central axle disconnect. if they are kinked, Cracked, disconnected or leaking in any way, your 4wd system WILL NOT work.
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BigBunnell
98 F150 4X4 XLT flareside V6 5sp K&N Flowmaster and some other goodies
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BigBunnell
98 F150 4X4 XLT flareside V6 5sp K&N Flowmaster and some other goodies
Thread Starter
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Junior Member
Joined: Mar 2000
Posts: 3
Likes: 0
From: MO, USA
They are vacuum lines!! How they got crimped like they did and borke totally in two is a mystery. Here tehy broke was above the front axle near the wheel well. I was able to connect the ends into the conector by rerouting them for a tempoary fix, I guess I'll have to buy new vacuum lines to make a permanent repair. Thnks for the help.