2nd Gen Non-Engine/Transmission -need '98 seatbelt wiring diagrahm

[budnate]

guys I am striking out figureing out my seatbelt slash seat rebuild on the bench in the shop... anyone have the wireing diag for '98 seats Non power... & Power driver seat????



I have a choice seatbelt I would like to use but its stuck all the way wound up, DOH! and I cant figure out how to jumper power up to the module to release it on the non power seat and the truck was parted and gone so I cant just plug it in the cab and deal with it..... Bueller... Bueller??? anyone. . ?:{



Thnx ,B.

 

[fest3er]

A poor ASCII drawing of the seatbelt solenoid connectors:

|h|

|1|

|[u]2[/u]|

The 'h' indicates a notch and extra plastic on the connector.

Pin 1 is ground.

Pin 2 is B+ (switched battery from SCTM).



You should see 50 to 60 Ohms across the solenoid. If so, you can connect pin 1 to ground and momentarily (like 10-20 milliseconds) apply B+ to pin 2. You should feel the solenoid disengage. You might need to release tension for it to unlatch, though. If you get the polarity wrong, it shouldn't hurt the solenoid; it'll just make it latch even harder. You shouldn't need the SCTM to unlatch the retractors.



An equally poor ASCII drawing of the SCTM connector, looking at the mating side of the connector (I believe):

   ___________

 ___(____________)___

|  6  5  4  3  2  1  |

|[u]13 12 11 10  9  8  7[/u]|

Pinout:

1. N/C

2. Left door ajar switch sense

3. Rightdoor ajar switch sense

4. Fused ignition (RUN-ACC)

5. Fused B+

6. N/C

7. Left seatbelt solenoid

8. Right seatbelt solenoid

9. N/C

10. N/C

11. SCTM fault indicator

12. N/C

13. Ground



The SCTM has an accelerometer in it which lets it detect its orientation. Too much lean, or even upside-down, (more than . 7g sideways or upward) and it will latch the seatbelts.

 

[budnate]

I tried a 12v jumper on the retractor sunday and it smoked but only hit one end at a time, both ends need signal at the same time I would think? after I thought about it a bit... heading into work now, I will post pics and make a run at it tonight and see what happens, thank you.



Bud.

 

[budnate]

heading home soon from work, Fester I have the module and wiring do you think if I power up the harnes like where it plugged in under the driver seat pos and neg it will release? or will the module not seeing the other devices keep me locked?



kinda afraid to go that way and blow up the module if i am not sure.

 

[fest3er]

heading home soon from work, Fester I have the module and wiring do you think if I power up the harnes like where it plugged in under the driver seat pos and neg it will release? or will the module not seeing the other devices keep me locked?



kinda afraid to go that way and blow up the module if i am not sure.

If I had to guess, I'd say that if you have the SCTM properly oriented (right side up, in teh position it would be when mounted), it should release the seabelts. But remember, the doors probably have to be closed, or at least the 'door ajar' switch needs to be open (in 'door closed' position). If you have an ohm meter, you should check the resistance across the solenoid; if it's in the range, it should be OK. And you may want to do a continuity check on the harness, to be certain there aren't any short circuits. That is, check the solenoid's resistance at the seatbelt unit, then check it through the harness.



It's a pain being thorough, but it's the only way to be sure what you've got.

 

[budnate]

wiring schematic is diff from what I have... . any ideas?



under seat plug



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wiring to seat retractor



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[DODGEDADDIE]

Does any one have the colors of these wires ?
As I have 2 that are broken an melted an not sure what goes were.

THANKS

 

[budnate]

try these, lost my notes but these go to the seat and seat belt brain under the middle seat if I recall right.

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something is broken at photo bucket, I noticed it down on other sites tonight as well give a little time or email me.

B.

 

[Bob4x4]

SEAT BELT RETRACTOR LATCH SOLENOID
A seat belt retractor latch solenoid is integral to each of the two outboard front seat belt retractors. The solenoid is grounded at all times through its wire harness connector and circuit. The solenoid receives battery current, which is switched by the Seatbelt Control Timer Module (SCTM), through a fuse in the junction block.

When the seat belt retractor latch solenoids are energized the retractor spools are unlatched, and the seat belt webbing can be withdrawn from the retractor. When the solenoids are de-energized the retractor spools latch, preventing the seat belt webbing from being withdrawn any further from the retractor.

The seat belt retractor latch solenoids cannot be repaired. If the solenoid is faulty or damaged, the entire seat belt retractor unit must be replaced. Refer to Body for the seat belt retractor service procedures.

 

[Bob4x4]

circuit descriptions and diagrams, Refer to Restraint System in Wiring Diagrams.



Disconnect and isolate the battery negative cable. Unplug the wire harness connector from the Seatbelt Control Timer Module (SCTM)

Check the resistance between the inoperative (driver or passenger) latch signal circuit cavity of the SCTM wire harness connector and a good ground. The correct resistance should be from 50 to 60 ohms. If OK, see Seatbelt Control Timer Module in the Diagnosis and Testing section of this group. If not OK, go to Step 3.

Unplug the wire harness connector at the inoperative (driver or passenger) seat belt retractor latch solenoid. Check the resistance between the two terminals of the latch solenoid. The correct resistance should be from 50 to 60 ohms. If OK, go to Step 4. If not OK, replace the faulty seat belt retractor unit.

Check the resistance between the ground circuit cavity of the latch solenoid wire harness connector and a good ground. There should be no measurable resistance. If OK, repair the inoperative (driver or passenger) latch signal circuit between the solenoid wire harness connector and the SCTM wire harness connector as required. If not OK, repair the circuit to ground as required.

 

[Bob4x4]

circuit descriptions and diagrams, Refer to Restraint System in Wiring Diagrams.



Disconnect and isolate the battery negative cable. Unplug the wire harness connector from the Seatbelt Control Timer Module (SCTM)

Check the resistance between the inoperative (driver or passenger) latch signal circuit cavity of the SCTM wire harness connector and a good ground. The correct resistance should be from 50 to 60 ohms. If OK, see Seatbelt Control Timer Module in the Diagnosis and Testing section of this group. If not OK, go to Step 3.

Unplug the wire harness connector at the inoperative (driver or passenger) seat belt retractor latch solenoid. Check the resistance between the two terminals of the latch solenoid. The correct resistance should be from 50 to 60 ohms. If OK, go to Step 4. If not OK, replace the faulty seat belt retractor unit.

Check the resistance between the ground circuit cavity of the latch solenoid wire harness connector and a good ground. There should be no measurable resistance. If OK, repair the inoperative (driver or passenger) latch signal circuit between the solenoid wire harness connector and the SCTM wire harness connector as required. If not OK, repair the circuit to ground as required.

 

[DODGEDADDIE]

I Lucked out,and found a timer an the wiring harness in the last of 15 trucks @ a salvave yard,,BUTTTT only $10 And with the new/used harness was able to splice the old with the new.
Every thing is fine now,,
PLUS I have a spare timer,,As I'm guessing my issues were the 2 melted wires.

THANKS EVERY ONE. .
the photos are great. . I just wished I logged on before I did mine,,,