Precision Harness

Precision Harness CAB TO ENGINE ECM WIRING for OEM/custom built engine swaps on class8 trucks only
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It was a freightliner week, 5 harnesses all for Freightliner classics and FLD’s. Pictured are 2 of them that we did. On...
07/24/2026

It was a freightliner week, 5 harnesses all for Freightliner classics and FLD’s. Pictured are 2 of them that we did. One was for an FLD going from a celect plus to a Detroit ddec4. The other is an FLD going from a celect plus to a 3406E 40pin CAT.

Custom harness for a 1996 Freightliner FLD going from a Detroit ddec3 to a Cummins Celect Plus.
07/15/2026

Custom harness for a 1996 Freightliner FLD going from a Detroit ddec3 to a Cummins Celect Plus.

OEM replacement style harness for 1998-2003 Peterbilt trucks with N14C+ engines
07/06/2026

OEM replacement style harness for 1998-2003 Peterbilt trucks with N14C+ engines

Harness to install a Detroit ddec3/4 into Peterbilt 389s. Harness, throttle sensor, battery box harness and waterproof J...
06/30/2026

Harness to install a Detroit ddec3/4 into Peterbilt 389s. Harness, throttle sensor, battery box harness and waterproof J1939 processor✔️

Custom harness to install a Detroit ddec3/4 into 99-03 Peterbilts that originally came with a 70pin CAT 2WS/6NZ
06/17/2026

Custom harness to install a Detroit ddec3/4 into 99-03 Peterbilts that originally came with a 70pin CAT 2WS/6NZ

Custom harness for a 1996 kenworth T800 to go from a Cummins Celect to a Celect Plus.
06/04/2026

Custom harness for a 1996 kenworth T800 to go from a Cummins Celect to a Celect Plus.

Custom harness to install a 70pin CAT into 1990-1996 Peterbilt trucks that originally came with a Cummins Celect. Thinki...
05/21/2026

Custom harness to install a 70pin CAT into 1990-1996 Peterbilt trucks that originally came with a Cummins Celect. Thinking about an engine swap similar to this? Contact us today!

Custom harness for 1997.5-1998 Peterbilts going from a 40 pin CAT to 70pin CAT
05/18/2026

Custom harness for 1997.5-1998 Peterbilts going from a 40 pin CAT to 70pin CAT

Harness to install a Cummins ISX CM570 into a Kenworth W900L
05/12/2026

Harness to install a Cummins ISX CM570 into a Kenworth W900L

Custom harness to install a 70pin CAT into 1994-1998 Peterbilt 379s that originally came with a Detroit ddec3/4 engine.
04/29/2026

Custom harness to install a 70pin CAT into 1994-1998 Peterbilt 379s that originally came with a Detroit ddec3/4 engine.

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