Truck has no power when I roll down drive window

[miesk5]

Yo J,

Does starter crank engine when it has power?

One thing that Ford suggests for intermittent conditions is a wiggle text.

The technician can attempt to re-create & detect an Intermittent fault using the Wiggle Test procedures.

Key On Engine Off Wiggle Test Procedure:

Hook up a Scan Tool.

Turn the ignition key to the ON position.

For Scan Tool, enter Continuous Monitor Diagnostic Test Mode (DTM), then enter wiggle DTM.

*** BEWARE OF FAN, HOT ENGINE, HOSES, BELTS, PULLEYS ***

Tap, move, and wiggle the suspect sensor and/or harness. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:

Malfunction Indicator Lamp (MIL) aka CEL: Lights

Scan Tool: Continuous Tone

Engine Running Wiggle Test Procedure

Special Note:

The Engine Running Wiggle Test may be activated any time the engine is running.

Hook up a Scan Tool

Key off.

Start the engine.

For Scan Tool, enter DTM, then enter wiggle DTM.

Tap, move, and wiggle the suspect sensor and/or harness or drive the vehicle.

When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:

CEL Lights

Scan Tool: Beeps

....

Intermittents are usually caused by one or more of the following: deteriorated electrical connections, terminal issues, etc. Start by carefully inspecting the suspected circuit for the following conditions:

***Poor mating of the connector halves, especially if the locking tabs are broken, which occurs with our elderly Broncos.***

Terminals backed out or not fully seated in the connector

Damaged terminals or poor terminal to wire connections

Corrision or water intrusion. Pierced or damaged insulation can allow moisture to enter the wiring causing the conductor to corrode inside the insulation. Look for swollen and stiff sections of wire in the suspect circuits.

Wires that are broken inside the insulation

Pinched, cut or chaffed wiring in the harness

Look for unravelled or missing harness wrapping and loose harnesses where PO pulled harness from its straps, and/or clips.

Wiring that is damaged as a result of being in contact with exhaust components.

 

[Jojomular14]

So this morning it started for me and had full power. I let it idle for about ten min didn't touch anything and it was fine. Turned head lights on and those didn't do anything to make it die. Then went and put pass window down and up on pass side didnt do anything. Then went over to driver door and hit lock/unlock switch once then twice and it killed it. Truck is now completely dead and he's no power at all like before. This is what it will do. I have taken apart driver door and all wiring is good and ground is good. I'm stumped. Guess I'll wait for test tool and see if I can get a code to throw.

 

[miesk5]

Yo,

How do the fusible links look like at starter relay?

Location pic between the starter relay and alternator);

"...the green wire in my fingers you can see at the eyelet there is a black plastic block). the last pic is of my 85. i think that big block is another style fusible link ford used on older stuff (but im not sure)..."

http://s268.photobucket.com/user/shift1313/media/89%20Bronco/PB020002.jpg.html

Location pics in an 85 & 89 (between the starter relay and alternator)"...the first two pics are of an 89 5.0. because of the loom i wasnt able to trace the wires...The second pic is at the starter relay to show you a fusible link wire (the green wire in my fingers you can see at the eyelet there is a black plastic block). the third pic is of my 85. i think that big block is another style fusible link ford used on older stuff (but im not sure)..."

by shift1313 (Matt)

 

[miesk5]

Yo,

I just realized that you checked the fusible links.

I THINK you have power at fuse box, so try this Ignition Switch Continuity Testing (Logic Tables) in an 83; "...The following proceedure is from the 1983 Ford Service manual, with a few minor wording changes, but should work for any year. Also included are a couple of illustrations from the same proceedure to help you visualize it..."

Source: by Seabronc (Rosie, Fred W) at Continuity Testing (Logic Tables) in an 83; http://broncozone.com/topic/7243-ignition-switch-adjustment-proceedure/

 

[Jojomular14]

Ok I'll give it a try and give feed back. Thank you for the help

 

[Jojomular14]

Well I plugged the code reader in and hit the memory button and the truck lit up like a tree and has been working kinda good since. They only thing it does now is when I turn on the headlights the motor sometimes dies but I still have power to the whole truck and it will start back up. It doesn't do it all the time tho

 

[miesk5]

Yo,

That is anothrr thing that perplexes me.

The only thing that I can guess is that the code reader somehoe complteted the ground circuit;

Scan Tool Won’t Initiate Self-Test Due to Poor Grounds, Corroded Wiring, etc.



Source: by Jeremy M (Big '92, jermil01)

But, I ask that you further define "no power at all".

When this happens or when it first occurred:

Did these items work with ignition key in off ornot in key cylinder?

Horn

Headlights

Dome light with door(s) open

 

[Jojomular14]

There was no power at all no lights no horn nothing it was completely dead.

 

[Jojomular14]

The truck starts every morning before I leave for work I have pulled it in and out of the driveway a few times but haven't taken it for a longer test drive. It seems to be working fine idk what the problem was but it seems to be ok for now. I will test drive it this weekend and give feed back

 

[miesk5]

Yyo,

Ok, thanks for the info and update!

I have to look back at page 1 of this thread to see where you tested and;

Found battery voltage at starter relay,

at alternator, etc.

While at same time, you did not find voltage beyond those places such as the fuse panel, green fusible link to and at ignition switch Yellow wire, etc.

See wiring diagrams at

http://www.revbase.com/BBBMotor/Wd

I had a dead cell in the battery once. Saw 12.4 volts at terminal although starter did not spin. I tried to turn key to start a few times, then starter spun and engine ran. Got to parts store and it died as I pu,led into parking space.