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Engine Wiring Harness: The following lists the engine and vehicle side connections. Optional circuits are described in the 'System Features' section
below:
NOTE: A Malfunction Indicator Lamp (MIL- sometimes called a "service engine soon" light) is mounted inside the fuse/relay center. A redundant
MIL output is also available in the harness near the pedal module connector. It is recommended that a MIL also be installed in a visible location
in the passenger compartment. This circuit requires any 12v low current light and an ignition 12v power source. The ECM MIL output supplies
the ground for the circuit.
Connections Required for Correct Operation
Coolant Sensor
Mass Air Flow (MAF) Sensor
Camshaft Position Sensor
Electronic Throttle Control
Manifold Absolute Pressure (MAP) Sensor
Oxygen Sensors (2 total)
Knock Sensors (2 total)
Ignition Coil Blocks (2 total)
Fuel Injectors (8 total)
Crankshaft Position Sensor
Accelerator Pedal Sensor
Ignition Switch Input (Wire)
Fuel Pump Control (Wire)
Engine Grounds (3 total)
Battery Power
Cooling Fan Control Wire
Optional Connections (Not required for operation)
Alternator Control Connector
Engine Oil Pressure Sensor
Vehicle Speed Sensor
Optional User Outputs Bulkhead
Connections
Connect all engine/vehicle-side connectors before connecting the harness to the ECM. All engine/vehicle-side connectors are functionally labeled,
consult a service manual if necessary to determine connection locations (see following service manual information).
Note: It may be easier to install the harness on the engine before installing the engine into the vehicle
The harness includes a fuse/relay center containing all required fuses and relays, and also a 12-way bulkhead connector (with sealed mating
connector) which contains outputs that may be useful to the user (see 'Bulkhead Connector Outputs' section below). The fuse/relay center should
be mounted as high in the engine compartment as possible to avoid unnecessary splash and road debris. Likewise, keep the 12-way bulkhead
connector and diagnostic link connector (both connect from the fuse/relay center) as high and protected as possible.
The 3 ECM connectors are indexed to connect only in the correct locations. Install by pressing down firmly until the connector is seated, then pull
the top slider bar down until it snaps and locks into place. The bar should slide easily and will not move unless the connector is seated properly, do
not use excessive force.
Attach the harness ground eyelets (3 total) to the engine block, ensuring the connections are clean and secure, and attach the fuel pump wire from
the fuse/ relay center to the power side of the pump (this feed is fused and relay-controlled from the ECM).
DR-525 Series Crate Engine Control System
ALL INFORMATION WITHIN ABOVE
Date
BORDER TO BE PRINTED EXACTLY
31MY16
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
02FE21
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
03MY23
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
2 pin Connector
5 pin Connector
3 pin Connector
6 pin Connector
3 pin Connector
5 pin Connectors
2 pin Connectors
8 pin Connectors
2 pin Connectors
3 pin Connector
6 pin Connector
-
-
Eyelets
(Stud at Fuse/Relay Center)
-
-
3 pin Connector
2 pin Connector Only
required if CPP Connect &
Cruise Transmission Controls
12 pin Connector (12-way)
Revision
Init Rel – Blake Nye
Revision - Blake Nye
Revision - Blake Nye
PART No.
Rev 03MY23
19329244
Auth
DR
Installation Instructions
Title
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DR-525 Series Crate Engine Control System
NA
PART No.
SHEET
4 of 33
SHEET 4 of 33
19329244
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