What is an ECM harness?
Description. This is the main wire harness that provides power to the throttle body assembly, the ignition, the crank sensor, and the cylinder head temperature sensor. The harness also provides sensor feedback to the ECU for engine operation.
How much does it cost to replace an engine harness?
If you buy a basic engine harness wiring, it could cost $40 to buy it. On the other hand, the cost of a specialty wire starts at $90. Furthermore, the installation cost for a basic engine wiring harness is usually the specialty harness wiring installation.
Are ECMs waterproof?
I did an article about a year or so ago talking about why ECMs are not completely waterproof. Most ECMs have a hole in them, a breather, to equalize air pressure inside the case when the ECM heats up, cools, and changes elevation. Three things you can do to avoid this kind of ECM damage.
How do you change the wiring on an ECM?
Unbolt the screws holding the ECM in place with a socket wrench. Pull the old ECM out and replace it with the new one. Bolt the ECM in place with the socket wrench. Ensure the bolts are tight. Plug in the electrical wires to the ECM. The wiring harness will lock in once it is pushed in far enough. Connect the battery cables to the battery.
Is there a problem with the Jake engine?
One down, two to go. If the problem was only an intermittent Jake issue, we would be taking a hard look at the sensor and injector harnesses, but as it is directly related to the engine fan, we can eliminate those as potential problem areas at this point.
Where is the connection between the Jake and the engine fan?
The interaction between these two circuits could only happen in one of three places. The most likely location is the primary OEM wiring harness that links the DDEC’s engine controller to the connectors on the firewall. This harness supplies the input and output signals for both the Jake and the engine fan.
What happens when the ECM on a car goes bad?
When the ECM goes bad, it can cause the car to run erratically, if at all. Replacement takes just a matter of minutes, as the ECM is easy to access. The location of the ECM depends on the make and model of the vehicle.