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The first thing I would check is if there is power to the switch. Power is provided to the seat via a circuit breaker and not a traditional fuse. In the vehicle, locate the fuse box. Circuit breaker A is the one that powers it. See pictures 1 and 2. Also, here are links that shows how to use a test light and how to test wiring:
Now, there was a technical service bulletin (TSB) which indicated a wiring problem. Basically, the wiring harness located under the seat would get damaged from the seat moving. Here is the bulletin and picture 3 attached correlates with the TSB:
File In Section: 8 - Chassis/Body Electrical
Bulletin No.: 76-81-09
Date: June, 1997
Driver's Power Seat
1995 Chevrolet and GMC C/K Models
with Driver's Power Seat (RPO AG9 & AE7 or A95)
Some owners may report the driver's power seat is inoperative.
The power seat wiring between the seat operating switches and the seat motors is bundled together with tape on vehicles manufactured before 3/13/95. Normal use of the seat may cause movement of the wire bundle against the seat frame or the seat suspension wires. Vehicles manufactured after that date have a protective conduit.
When making any repair to the driver's power seat, inspect the power seat wiring between the seat operating switches and the seat motors (see Figure 1), for signs of damage to the tape or insulation. Repair any damaged wire/s following the procedure described in Section 8A (Electrical Diagnosis Repair Procedures) of the 1995 C/K Truck Service Manual. In addition, install protective wire conduit, P/N 8919355, cut to required length, over the wires so that it extends past the seat frame edge. Tape the conduit at both ends to secure it properly. Nylon conduit material, 0.50" (13 mm) diameter may be procured locally if this part number is not readily available.
Picture 4 shows a schematic of the wiring.
Please feel free to ask questions if you have them. I hope this helps.
Images (Click to enlarge)
Saturday, November 17th, 2018 AT 8:23 PM