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Tommy_Tunes

New member, Hello!

NE of Seattle, unincorporated King County in the trees!
Gifted an 86 F150 4sp manual, 68k or 168k? Ha. It needed resurrection: trans rebuild, SPROUT cleaned so it would accelerate (one reason the previous owner got sick of it, easy fix!). And numerous maintenance work to get it ready ready, so NOT 'free' any more...
Anyway, loving it, now chasing a parasitic battery drain, so I'll be seeing ya.

If I don't see you in the future, I'll see you in the pasture.
1986 F150XLT 5.0, 4-sp manual, granny gear. Huh

Gary Lewis

Re: New member, Hello!

Administrator

Tommy - Welcome! Glad you joined.

Sounds like a good "gift". Glad you got it going, but I'll bet their will be many layers to this onion. And you'll have enough onion rings to have a Bloomin' Onion when you are done.

Would you like to be on our map? You can see it at Bullnose Forum/Member's Map in the menu, and all we'll need is a zip.

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

grumpin

Re: New member, Hello!

In reply to this post by Tommy_Tunes

Welcome!

Dane
1986 F250HD SC XLT Lariat 4x4 460 C6-Sold
1992 Bronco XLT 4x4 351W E4OD
1998 GMC Sierra SLE K1500 350 4L60E
Arizona

ArdWrknTrk

Re: New member, Hello!

Administrator

In reply to this post by Tommy_Tunes

Welcome Tommy!

I'd be interested to see if it's just the alternator, and which kind of alternator you have in an '86

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Gary Lewis

Re: New member, Hello!

Administrator

Should be a 2G for an '86, but who knows what's on it now.

Gary, AKA "Gary fellow": Profile

ArdWrknTrk

Re: New member, Hello!

Administrator

When I look on RockAuto for an '86 F-pickup I see 60A and 70A with external regulator, and 65A with internal regulator.....

Either way it is the first place to check when you have substantial parasitic draw.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Tommy_Tunes

Re: New member, Hello!

In reply to this post by Gary Lewis

Sure, it says I can't add myself, so 98072 Woodinville Washington

If I don't see you in the future, I'll see you in the pasture.
1986 F150XLT 5.0, 4-sp manual, granny gear. Huh

Gary Lewis

Re: New member, Hello!

Administrator

Yep, you can't add yourself. But I've added you.

Gary, AKA "Gary fellow": Profile

Tommy_Tunes

Re: New member, Hello!

In reply to this post by ArdWrknTrk

I've unplugged the 2 wiring plugs at the alternator- test light from negative peg to ground wire still glows.
I'm hoping to find fuel pump cutoff relays, but the pic sent to me isn't what physically exists under my hood!
Tips??Screenshot_20221120_152305.jpg

If I don't see you in the future, I'll see you in the pasture.
1986 F150XLT 5.0, 4-sp manual, granny gear. Huh

Gary Lewis

Re: New member, Hello!

Administrator

The fuel pump relay can be in that bracket, but can also be by itself on the firewall. And part of that is determined by whether or not you have the camper or trailer package.

As for the parasitic draw, if the test light is on with the alternator disconnected - and the door closed - you should start pulling fuses to see which one turns it off.

Gary, AKA "Gary fellow": Profile

ArdWrknTrk

Re: New member, Hello!

Administrator

In reply to this post by Tommy_Tunes

Can you hear the pump running?
Or a relay clicking when you reconnect the battery (or connect your test light)

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Tommy_Tunes

Re: New member, Hello!

Yes, touching the new negative cable to the post causes a 1 second buzz/hum at the black wiring cover at the firewall. Priming?
No, can't hear fuel pumps running.
---> need a step stool to get high enough to reach down to that cover, hope it pops off easy?

If I don't see you in the future, I'll see you in the pasture.
1986 F150XLT 5.0, 4-sp manual, granny gear. Huh

ArdWrknTrk

Re: New member, Hello!

Administrator

This post was updated on .

(remove a bunch of links that didn't work

)

The EEC relay should be getting power at all times through fuse link N on circuit 37
But only be closed by the ignition switch in Start and Run.

........

The pump relay gets triggered by the ESC through ZZ

.........

The fuel pump relay is definitely under that cover as pictured on Pg. 107.
But the EEC shouldn't be able to activate it with the ignition Off.
If it does, that would suggest your ignition switch is mis-wired or has failed hot. 😳
If it is shorted, or the EEC is pulling power through it without the ignition key ON it will kill the battery.

(and

, the forum insert image tab is not working for me this morning.

Edit for clarity....

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Tommy_Tunes

Re: New member, Hello!

That's a lot of info.
Now my brain hurts. 😉
I'll go through it again and try to filter it down to what I should be laying my hands on.

If I don't see you in the future, I'll see you in the pasture.
1986 F150XLT 5.0, 4-sp manual, granny gear. Huh

ArdWrknTrk

Re: New member, Hello!

Administrator

This post was updated on .

In reply to this post by ArdWrknTrk

I'm going to try and edit the links into images today. Hopefully the forum is working better for me!

The EEC relay should be getting power at all times through fuse link N on circuit 37
But only be closed by the ignition switch in Start and Run. (circuit 20)

The pump relay gets triggered by the ESC through ZZ

The fuel pump relay is definitely under that cover as pictured in 471462...
But the EEC shouldn't be able to activate it with the ignition Off.
If it does, that would suggest your ignition switch is mis-wired or has failed hot. 😳
If it is shorted, or the EEC is pulling power through it without the ignition key ON it will kill the battery.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

ArdWrknTrk

Re: New member, Hello!

Administrator

In reply to this post by Tommy_Tunes

I would check that the EEC power relay (illustration Pg.60) is only getting pulled in by circuit 20 in run & start.

The fuel relay shouldn't be pulling closed with the key off, but battery connected.

Edit: look at the self test connector on Pg. 62 and be sure that isn't jumpered or otherwise connected and back feeding the system.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Tommy_Tunes

Re: New member, Hello!

Thanks for that!!!
I should have time tomorrow to pull it into the garage.

If I don't see you in the future, I'll see you in the pasture.
1986 F150XLT 5.0, 4-sp manual, granny gear. Huh