Copyright © 1998 General Motors Corp. E–39
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
APPENDIX E — CONNECTOR PART NUMBERS, TERMINAL PART
NUMBERS, TOOL PART NUMBERS, AND REPAIR INSTRUCTIONS
1–10. ITT CANNON CONNECTORS — SOLDERED (2-WAY HD RETARDER)
A. Connector Terminal Repair (refer to Figure E–11)
B. Special Tools
• 50–70 percent tin resin core solder, 18–20 SWG (0.086–1.0 mm (0.036–0.040 inch))
• Pen-type soldering iron (60W maximum)— tip no larger than 3.175 mm (0.125 inch)
• Desoldering braid
NOTE: Proper solder, techniques, equipment, and cleanliness are important to achieve a good solder joint.
Clean connector and terminals being soldered of all dirt, grease, and oil. Always heat the piece onto
which solder is to flow. A cold solder joint can cause intermittent continuity problems. Avoid a cold
joint by heating the piece(s) being soldered to melt the solder rather than merely heating the solder
until it melts. Excess solder applied to a stranded wire travels up the wire, stiffening it and making it
inflexible. The wire can break at the point where the solder stops. Do not use acid core solder.
C. Wire Removal — Desoldering
1. Unscrew backshell and slide the backshell away from the connector.
2. Slide the grommet away from the connector. Slide the grommet far enough to allow access to the
terminals and wire ends. If the grommet is hard to slide, lubricate the wires with isopropyl alcohol.
If necessary, move some of the harness covering. If no solder is present, proceed as in Section 1–9
for crimped terminals.
3. Place the desoldering braid (wick) on top of the soldered terminal cup and wire. Place the hot
soldering iron on the desoldering braid and wait until the solder wicks up the braid, remove the
wire.
4. If the other terminal is being repaired, repeat the desoldering operation on that terminal.
When solder is removed, proceed as in Section 1–9 for crimped terminals.
D. Soldering Wire Into Terminal
NOTE: If installing a new connector on a harness, ensure the backshell and grommet are in place before
soldering the wires to the terminals. Clean wires and terminals of dirt or grease.
1. Strip approximately 8 ± 0.8 mm (.31 ± .031 inch) of insulation from the wire.
2. Tin the stripped end of the wire.
3. Insert the wire through the proper hole in the grommet.
NOTE: Lubricate the wire(s) with isopropyl alcohol only if the wire(s) will not slide through the grommet.
If installing a new connector on the harness, be sure the backshell is in place before inserting the
wire(s) through the grommet.
Use Description P/N
Retarder Control (K Solenoid)
(HD/B 500 Models)
Connector Plug (2-pin)
Terminal (pin)
Connector Receptacle
29505516
29511913
29505515
Use Description P/N
FMTV 37-Way Bulkhead Plug Assembly
Receptacle Assembly
29502375
29502374
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