LIST OF TABLES
Table 4.1 Compatible Parts.............................................................................................................. 3
Table 6.1 Dash
Section Connections................................................................................................ 8
Table 6.2 Engine
Section Connections............................................................................................. 10
Table 6.3 Tail
Section Connections.................................................................................................. 13
Table 7.1 Diagnostic Trouble Codes................................................................................................ 14 & 15
1.0 INTRODUCTION
You have purchased what we at Painless Performance Products believe to be the most up-to-date and easiest-to-
install automotive fuel injection harness on the market. It is designed for easy installation, even if you have no
electrical experience.
This harness is designed to be a complete wiring system for the fuel injection system on General Motors 1994 and
newer LT1 injected engines and to control the 4L60E transmission. This includes all wiring that is needed by the
computer to run and control the injection system and transmission. A module has been included to bypass the vehicle
anti theft system (VATS) incorporated in the computer. When using this harness on a '96 or '97 engine you must
replace the coil, coil output wire and knock sensor with the parts from a '92 - '95 engine.
NOTE: The use of a 40 pulse Vehicle Speed Sensor, such as the one that comes
standard in the 4L60E transmission, is required when using a 1994 or newer
computer for operation of emission devices. The use of any other style transmission,
such as a 350 or 400 Turbo, which cannot operate a 40-pulse sensor, will require the
use of an earlier style computer. The use of a 4L60E will also require the use of an
electronic speedometer because of the absence of a cable drive in the transmission.
Usually, the computer, relays and fuse block can easily be mounted under the dash. Most of the wiring in the harness
has been pre-terminated to the proper connector and all wire has been GM color-coded. All wiring is TXL, 600 volt,
and 125 degree centigrade with cross-link insulation.
This fuel injection system harness have been divided into three major groups:
ENGINE GROUP
Includes wiring for the fuel injectors, distributor, and sensors.
DASH GROUP
Includes ignition feed wires, assembly line diagnostic link (DLC) connector,
check
engine
light,
computer
wiring
and connectors, brake switch wiring, gear
shift
indicator
wiring,
tachometer
wiring, air pump, canister purge, VATS and
fuse block.
TAIL GROUP
Include VSS wiring, transmission wiring (if applicable) and power wire for fuel
pump
.
2.0
ABOUT THESE INSTRUCTIONS
These instructions provide information for the installation of the 60502 LT1 (94 & 95) Fuel Injection Harness Kit.
The contents of these instructions are divided into major
Sections
, as follows:
1.0 INTRODUCTION
2.0
ABOUT THESE INSTRUCTIONS
3.0 TOOLS
NEEDED
4.0
PRE-INSTALLATION AND HARNESS ROUTING GUIDELINES
5.0
GENERAL INSTALLATION INSTRUCTIONS
6.0
60502 LT1 (94 & 95) FUEL INJECTION HARNESS KIT
8.0
TROUBLE-SHOOTING INSTRUCTIONS AND TROUBLE CODES
Sections
are further divided into
Paragraphs
and
Steps
. Throughout, the
Figure
numbers refer to illustration and
the
Table
numbers refer to information in table form. These are located in or near the sections or paragraphs to
which they correspond. Always pay careful attention to any notes or any text labeled
CAUTION
.
ii
