Near Intersection of I-35 & I-90 Southern Mn. | As always, I would check the power/ground sources. Although not mandatory, the general recommendation is that the large red wire goes directly to the positive 12V terminal of the battery and the large white wire goes directly to the negative terminal. This provides the most reliable connection for power and ground. This is assuming that the battery or batteries on the vehicle and its charging system are healthy. A weak charging system or a battery with a bad cell can cause strange results. You mention that the problem may have come about when you switched tractors. This would lead me to suspect the tractor is the culprit.
Since the display wiring harness consists of split loom, it is possible to open it up and observe the wires. Check for obvious weak spots, cuts etc. Also check the sockets in the display connector. This is the 16 pin connector that connects to the rear of the 450. Pin 1 provides ground (white wire) and Pin 16 provides 12V (red wire). I have seen where these sockets have become damaged when the 450 is mounted too close to a window.
If the display cable is connected directly to the battery and the wiring and sockets appears fine then the problem is likely internal to the 450.
If we were involved we would remove the four long screws in the corners of the back cover and the two shorter screws in the center and carefully remove the rear cover. There may be something that is obviously partially disconnected. If nothing is obvious then further investigation is necessary which may be more involved.
Edited by tedbear 7/8/2025 06:20
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Raven 450 Flow control valve
