1986 f-150 4x4 4.9l manual trans wiring issues

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odo
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1986 f-150 4x4 4.9l manual trans wiring issues

odo
I picked up this f-150 yesterday for cheap. Bought for a daily driver/farm truck combo. The boy i got it from said the ignition switch was bad. He had somebody install a push button. I went yesterday and got a new ignition switch, new coil, and new ignition module(fender mounted). I put a new battery in the truck, Installed the new ignition switch and get nothing when in the run or accessory position. I have power to the fuse box and all fuses are good. Any ideas on what is going on will be welcomed. Any help will be greatly appreciated.

David
86 f150 4x4
4.9 4-speed
David
Amelia, Va.
1986 Ford f-150
4 wheel drive
4.9   4-speed Manual
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

Gary Lewis
Administrator
David - You did post in the main section!  Perfect!  

I'm going to guess that your ignition switch isn't correctly adjusted.  See the instructions on the Ignition Switch tab here: http://www.garysgaragemahal.com/ignition.html.

However, if it is a tilt column there's a part that frequently breaks and can cause similar problems.  Check out the writeup here: http://www.garysgaragemahal.com/steering-columns1.html
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

odo
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

odo
Thanks, I've got the new one just hanging right now. Will get back on it early in the morning and see what I can figure out. Will let you know what I come up with.
David
Amelia, Va.
1986 Ford f-150
4 wheel drive
4.9   4-speed Manual
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

Steve83
Banned User
In reply to this post by odo
odo wrote
...get nothing when in the run or accessory position.
Are you saying it works in the START position?  Test each wire, according to this diagram & its caption:

odo
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

odo
It had nothing in any position. I put the new switch in this afternoon. Got it adjusted. Fixed the wiring under the hood from the guy putting in the push button and it now turns over with the key again. Next step is replacing the fuel pump, replacing the fuel tank/or fixing the old one, welding in a new rocker and cab corner on the drivers side........

Thanks for the help guys!!
David
Amelia, Va.
1986 Ford f-150
4 wheel drive
4.9   4-speed Manual
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

Gary Lewis
Administrator
Congrat's!  One layer of the onion peeled.  Soon you'll have a mess of onion rings!  
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

odo
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

odo
I’m a diesel mechanic by trade....the sad part is it’s been years since I touched an older ford. Most of what I do now is diesel powered water pumps.....stepping back to my roots with this onion.....
David
Amelia, Va.
1986 Ford f-150
4 wheel drive
4.9   4-speed Manual
odo
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

odo
In reply to this post by Gary Lewis
Okay, Im feeling really dumb. New fuel pump put on this evening. Hit the key and started the truck up. Turn the key to off and guess what???? Still running. What did i do wrong? Help Please.
David
Amelia, Va.
1986 Ford f-150
4 wheel drive
4.9   4-speed Manual
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

Gary Lewis
Administrator
Any chance that the ignition switch isn't coming back to Off?  Did you pull the positive battery cable to stop it?
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

odo
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

odo
I would say the switch is going to the off position because it cuts power to the blower motor......I pulled the positive cable but had to choke out the engine to shut it down. I believe the wiring on the start relay is not right but cant blow up the diagram enough to see what's what on my phone.
David
Amelia, Va.
1986 Ford f-150
4 wheel drive
4.9   4-speed Manual
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

Gary Lewis
Administrator
There are multiple contacts in the ignition switch and they seem to make/break at different times.  For instance, I've seen many trucks that the ignition circuit would make when coming back to Run but the accessory circuit wouldn't unless you rolled the key back toward Off a bit.  So if it could do that then you might still have ignition when the accessories are off.

On the starter relay wiring, do you have DS-II or EEC?  I can blow that up and post it if it would help.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

odo
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

odo
It's the ds-II I believe. Module mounted on left fender, blue grommet two connectors.
David
Amelia, Va.
1986 Ford f-150
4 wheel drive
4.9   4-speed Manual
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Re: 1986 f-150 4x4 4.9l manual trans wiring issues

Gary Lewis
Administrator
Yes, blue grommet is DS-II.  See if this helps.  But this is just the starter relay and I'd be surprised if that's where the problem is.



Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI