Pontiac Fiero 1988 Service Manual page 442

DRIVEABILITY AND EMISSIONS - F U E L INJECTION 6E-15
T W I S T E D / S H I E L D E D C A B L E
DRAIN WIRE
Z
OUTER JACKET
MYLAR
1. REMOVE OUTER JACKET.
2. UNWRAP ALUMINUM/MYLAR TAPE. DO NOT
REMOVE MYLAR.
T W I S T E D L E A D S
1. LOCATE DAMAGED WIRE.
2. REMOVE INSULATION AS-REQUIRED.
UNTWIST CONDUCTORS. STRIP INSULATION AS
NECESSARY.
SPLICE & SOLDER
SPLICE TWO WIRES TOGETHER USING SPLICE
CLIPS AND ROSIN CORE SOLDER.
DRAIN WIRE
4.
SPLICE WIRES USING SPLICE CLIPS AND ROSIN CORE
SOLDER. WRAP EACH SPLICE TO INSULATE.
5. WRAP WITH MYLAR AND DRAIN (UNINSULATED) WIRE.
4. COVER SPLICE WITH TAPE TO INSULATE
FROM OTHER WIRES.
5. RETWIST AS BEFORE AND TAPE WITH
ELECTRICAL TAPE AND HOLD IN PLACE.
txnr
2
6. TAPE OVER WHOLE BUNDLE TO SECURE AS BEFORE.
4S 0570-6E
Figure 5
- Wire
Harness Repair
WIRE H A R N E S S
Wire harnesses should be replaced with proper
part number harnesses. When signal wires are spliced
into a harness, use wire with high temperature
insulation only. See Figure 5 for instructions.
With the low current and voltage levels found in
the system, it is important that the best possible bond
at all wire splices be made by soldering the splices as
shown.
Use care when probing the connector or replacing
terminals in them. It is possible to short between
opposite terminals. If this happens to the wrong
terminal pair, it is possible to damage certain
components. Always use jumper wires between
connectors for circuit checking. NEVER probe
through the Weather-Pack seals or insulation. Even
microscopic damage or holes may result in eventual
water intrusion, corrosion and/ or component or circuit
failure.
When diagnosing, open circuits are often difficult
to locate by sight because oxidation or terminal
misalignment are hidden by the connectors. Merely
wiggling a connector on a sensor or in the wiring
harness may correct the open circuit condition. This
should always be considered when an open circuit or
failed sensor is indicated. Intermittent problems may
also be caused by oxidized or loose connections.
Before making a connector repair, be certain of the
type of connector. Weather-Pack and Compact Three
connectors look similar but are serviced differently.
Replacement connectors and terminals are listed in
Group 8.965 of the Standard Parts Catalog.
CONNECTORS
Weather-Pack
Some connectors used with an ECM are called
Weather-Pack. Figure 6 shows a Weather-Pack
terminal and the tool (J-28742, BT-8234-A or
equivalent) required to service it. This tool is used to
remove the pin and sleeve terminals. If removal is
attempted with an ordinary pick, there is a good
chance that the terminal will be bent or deformed and,
unlike standard blade type terminals, these terminals
cannot be straightened once they are bent.
Make certain that the connectors are properly
seated and all of the sealing rings in place when
connecting leads. The hinge type flap provides a
backup, or secondary locking feature for the
connector.
They are used to improve the connector reliability
by retaining the terminals if the small terminal lock
tangs are
not
positioned
properly.
Weather-pack
tsftnnections cannot be
replaced
with standard connections. Instructions are provided
with Weather-pack connector and terminal packages.