esof problems

[fakker]

hey there. I am new to the sight and have heard that you are the man when it comes to these transfer cases. I have a 1987 xlt 302 with push button. When i first got the bronco i tried to push the button but it would not engage. I took it to a friends shop and we put it on a lift and he held the button in and it worked fine. That was over a year ago and have always held the button in until i heard the clunk and the 4x4 light came on. A couple of nights ago during the ice storm here in arkansas i tried to engage it and got all the usual clicks and chatter from the module but no engaging. I tried about 15 times or so and finally got no clicks at all. I tested the module by unplugging the two connectors and got the four blinks from the led. Now i was holding the button in for about eight seconds each time. Fuse # 6 is ok. I heard that there was a relay under the hood so i looked for it. I found one by the brake booster closest to the engine ( there are 2) and the main wire with a fusable link is melted. Also at the connector on the relay the wires are fried as well. Does this go to my esof or something else. What else can i look for that would not enable me to get the clicking and chatter from the module?

Thanks a bunch,

Fakker

 

[miesk5]

yo!

Dustin has a great 1356 Electric Shift Motor Troubleshooting & Repair tech

btw, to avoid confusion; "...As of 1994, the Neutral Safety Switch is referred to as a Manual Lever Position Sensor (MLPS) or Transmission Range (TR) Sensor..." Doubt that this is da problem... you would have troubl shifting the tranny.

Failure Causes & pic by Ford motorcraft.com

--

and one by Ricky - but Dustin's is prob what you need

----

Those relays, am guessing now since I can't recall what is what in your yr right now due to all da changes Ford made in thos years, are the fuel pump relay (GREEN) and eec relay (brown)

following by Fireguy50"

"...The Electronic Shift Control Module is powered at all times through Circuit Breaker 12 of the Fuse Panel to retain its memory capability. Fuse 18 provides power for the switches and the Electric Shift Motor when the Ignition Switch is in RUN. Fuse 10 provides power for nighttime illumination of the Electronic Shift Control Switch.

When the Electronic Shift Control Switch is placed in the 4x4 or LO position, the Electronic Shift Control Module analyzes information from the Shift Position Sensors to determine their current positions. The Module also analyzes information inputs from the Transfer Case Speed Sensor and the MLP Sensor or Park/Neutral Position Switch. The Electronic Shift Control Module then activates the Transfer Case Motor to produce the desired shift, and the 4x4 Indicator lights up.

http://fordfuelinjection.com/files/1356-1.gif

http://fordfuelinjection.com/files/1356-2.gif

http://fordfuelinjection.com/files/1356-3.gif

..."

 

[fakker]

Now in the schematic it shows three power wires. Where would P1, P2, and P3 be conected? Wich one would connect to cb #12 and wich one to fuse # 6 in my 1987?

quote name='miesk5' date='Jan 30 2009, 06:48 AM' post='88804']

yo!

Dustin has a great 1356 Electric Shift Motor Troubleshooting & Repair tech

btw, to avoid confusion; "...As of 1994, the Neutral Safety Switch is referred to as a Manual Lever Position Sensor (MLPS) or Transmission Range (TR) Sensor..." Doubt that this is da problem... you would have troubl shifting the tranny.

Failure Causes & pic by Ford motorcraft.com

--

and one by Ricky - but Dustin's is prob what you need

----

Those relays, am guessing now since I can't recall what is what in your yr right now due to all da changes Ford made in thos years, are the fuel pump relay (GREEN) and eec relay (brown)

following by Fireguy50"

"...The Electronic Shift Control Module is powered at all times through Circuit Breaker 12 of the Fuse Panel to retain its memory capability. Fuse 18 provides power for the switches and the Electric Shift Motor when the Ignition Switch is in RUN. Fuse 10 provides power for nighttime illumination of the Electronic Shift Control Switch.

When the Electronic Shift Control Switch is placed in the 4x4 or LO position, the Electronic Shift Control Module analyzes information from the Shift Position Sensors to determine their current positions. The Module also analyzes information inputs from the Transfer Case Speed Sensor and the MLP Sensor or Park/Neutral Position Switch. The Electronic Shift Control Module then activates the Transfer Case Motor to produce the desired shift, and the 4x4 Indicator lights up.

http://fordfuelinjection.com/files/1356-1.gif

http://fordfuelinjection.com/files/1356-2.gif

http://fordfuelinjection.com/files/1356-3.gif

..."

 

[miesk5]

Now in the schematic it shows three power wires. Where would P1, P2, and P3 be conected? Wich one would connect to cb #12 and wich one to fuse # 6 in my 1987?
yo!

Sorry, looks like his web site is down right now.

Did you go through his Test Procedure for NO operation or whatever he titled the section that applies to your problem?

he has an 88... don't know if fuses and CD are same for your year. Maybe someone else can inform you.

If I recall, one went to the Ignition switch; other to batty (which is prob the CB) other is prob fused ckt... prob can est with Multimeter for voltage or ck fuse compt. cover for fuse/cb Legend. I haven't seen anyone post the legend anywhere on da net yet... But ck color codes in Fireguy's diagrams; if they match, ck for power at those locations/wires.

GL

following by Fireguy50"

"...The Electronic Shift Control Module is powered at all times through Circuit Breaker 12 of the Fuse Panel to retain its memory capability. Fuse 18 provides power for the switches and the Electric Shift Motor when the Ignition Switch is in RUN. Fuse 10 provides power for nighttime illumination of the Electronic Shift Control Switch.

When the Electronic Shift Control Switch is placed in the 4x4 or LO position, the Electronic Shift Control Module analyzes information from the Shift Position Sensors to determine their current positions. The Module also analyzes information inputs from the Transfer Case Speed Sensor and the MLP Sensor or Park/Neutral Position Switch. The Electronic Shift Control Module then activates the Transfer Case Motor to produce the desired shift, and the 4x4 Indicator lights up.

http://fordfuelinjection.com/files/1356-1.gif

http://fordfuelinjection.com/files/1356-2.gif

http://fordfuelinjection.com/files/1356-3.gif

..."

 

[fakker]

Is there any way i can jumper the connector at the indicator switch and test the switch that way?