Home › Guides › Painless 60522 LS1 drive-by-wire harness: wire colors & hookup
Painless 60522 LS1 drive-by-wire harness: wire colors & hookup
The Painless 60522 is a stand-alone harness for 1997–2004 GM LS1 engines with drive-by-wire throttle. Its engine connectors are pre-terminated, so the job is mostly matching each labeled branch to the right sensor. This is the full hookup list by wire color, from Painless's instructions.
Last updated
Painless lists wire colors per connector, not cavity-by-cavity pinouts, so that is what we show. The factory PCM still needs a tune that removes the anti-theft (VATS) before the engine will run.
Before you connect anything
- Separate the tail section from the engine group and set it aside.
- Connect both Starter B+ ring terminals (red) to the large battery terminal on the starter solenoid.
- Ground the three large ring terminals (black and black/white) to the engine. Bolt them down separately, not stacked on each other.
Engine section
| Connects to | Wires (as labeled by Painless) |
|---|---|
| Knock sensor | blue lt. blue |
| Driver side O2 sensor | tan / white purple / white black pink |
| Passenger side O2 sensor | tan purple black pink |
| MAP sensor | orange / black lt. green gray |
| Cam position sensor | brown / white red pink / black |
| Crankshaft position sensor | blue / white yellow / black lt. green |
| Driver side front injector | pink black |
| Passenger side front injector | pink lt. green / black |
| Driver side 2nd injector | pink pink / black |
| Passenger side 2nd injector | pink lt. blue / black |
| Driver side 3rd injector | pink black / white |
| Passenger side 3rd injector | pink yellow / black |
| Driver side rear injector | pink red / black |
| Passenger side rear injector | pink blue / white |
| Throttle position sensor | blue green purple white pink yellow / black |
| MAF/IAT sensor | yellow black / white pink purple tan |
| Engine coolant temp sensor | black yellow |
| Driver side coil connector | purple red green lt. blue brown black pink |
| Passenger side coil connector | red / white purple / white lt. blue / white green / white brown / white black pink |
| Oil pressure sensor | tan / white black gray |
| TAC motor | yellow brown |
| Alternator | red gray |
| Engine ground | black (3) black / white (3) |
| Starter solenoid battery terminal | red (2) |
Dash section
| Connects to | Wires (as labeled by Painless) |
|---|---|
| Diagnostic link connector (4 wires) | green black black / white orange |
| Fuel pump relay (4 wires) | gray green / white black orange |
| Speedometer | green / white |
| Tachometer | white |
| Gear indicator switch | orange / black black / white |
| Brake switch | pink purple lt. blue |
| Ignition power | pink |
| Coolant fan #1 relay | green |
| Coolant fan #2 relay | blue |
| Skip shift light | white / black |
| Clutch pedal position switch | gray pink |
| Cruise control switch | pink blue / white gray / black gray |
Cruise control switch (GM 25111262)
The harness has four cruise wires but no connector (Delphi discontinued it). Match them to the switch like this:
| Switch pin | Harness wire | Switch wire | Circuit |
|---|---|---|---|
| A | pink | blue | Power |
| B | gray | green | Cruise on switch signal |
| C | gray / black | red | Resume/accel signal |
| D | blue / white | yellow | Set/coast signal |
We may earn a commission when you buy through links on this page.
Tail section
With a 4L60E, plug in the 13-position TRANS connector and tape up the reverse-lockout and skip-shift plugs. With a T56, do the opposite: connect those two solenoids and tape up the TRANS connector. Either way, connect the VSS and run the gray wire to the fuel pump.
| Connects to | Wires (as labeled by Painless) |
|---|---|
| Vehicle speed sensor | purple / white lt. green / black |
| Reverse lockout solenoid (T56) | pink lt. green |
| Skip shift solenoid (T56) | pink gray |
| 4L60E 13-position transmission connector | blue pink (2) lt. green red brown yellow / red orange / black white tan / black lt. blue / white red / black yellow / black |
| Fuel pump power terminal | gray |
Using a Holley ECU instead? See the Holley EFI pinout. Trimming the factory harness? P01/P59/E38 computer pinouts. Harness options: Tuning an LS or LT.
Parts on this page: Painless 60522 harness · GM 25111262 cruise switch · GM 12565643 pedal (the one Painless lists) · TAC modules
Wiring questions
- Best LS swap wiring harness
- How to make a standalone LS wiring harness
- How do you keep the stock cluster and tach working behind an LS/4L60E without cutting the factory harness?
- How do you convert a factory 4L60E engine/transmission harness to control a 4L80E when swapping transmissions behind an LS?
- Where should I run a standalone LS harness into the cab of a 72 without drilling new firewall holes?
- Which aftermarket swap harness should I buy for a 5.3 swap?
- What is needed to incorporate the LS harness into the stock wiring of an older truck?
- Which standalone harness company should a first-timer use for a 5.3 DBW / 4L60E swap in a 67 stepside?
- What wiring harness and computer options make the most sense for a 6.0 LQ4 LS swap if I don't want to learn tuning myself?
- Where can I find wiring harness pinout information for an LS conversion?
- Engine swap questions - 24x vs 58x and harness compatibility?
- How should I wire my LS swap — factory harness or aftermarket, and how do I fix a reported misfire?