Frequently Asked Questions

The color coding of several wires in the 1968 Pontiac A.T.C. harness have been changed. The wiring schematic on the reverse side of the original bulletin reflects these changes and should be referred to when servicing cars equipped with the new type harness.

Also correct your 1968 Service Manual on Page 1B-2. Step 6 under ADJUST DOOR LINK should read:

“Apply 12 volts (available at bat. terminal of fuse block) to terminal number 1 (one) only. This will cycle programmer to full cold.”

The updated wiring schematic is shown in the scan below.

This is a transcription of the original dealer bulletin for easier reading and search. The complete original scan, including the figures, is shown below.

Use the following procedure in the event of freon loss from the air conditioner system:

1. Replace both “O” ring seals between muffler fitting and compressor.
2. Install new low pressure hose (P.O.A. valve to compressor).
3. Inspect (and correct) rest of system for loose clamps, fittings or ruptured high pressure hose.
4. Evacuate and charge system and recheck for freon leak using standard procedure listed in Diagnosis Manual.

Parts Information — Use Only

Replacement Parts — A/C Freon Loss Repair

Part Name	Part Number
Low Pressure (Suction) Hose (service hose should bear identification E.H.R. 3399)	3004948 [F-3]
Muffler Fitting to Compressor Seal Pkg. (5/Pkg.) (Dated after 5-1-68)	5887997 [ZAC]

Return hose and seals to the Pontiac F.E.W. Room.

Flat Rate and Warranty Information

Flat Rate Operations — A/C Freon Loss

Operation No.	Operation Description	Time
013-339	Replace suction hose	.2
013-348	Replace “O” ring seals	.2
—	Evacuate and charge	1.2

Use appropriate flat rate operation number if other items require service.

This is a transcription of the original dealer bulletin for easier reading and search. The complete original scan is shown below.