I have a 1989 ProV 150 on which the oil level lamps are not working properly.
Upon turning the key to the on position, the red oil indicator flashes four times, a 0 is displayed on the RPM gauge and one bar is illuminated on the tilt indicator during the test period. It then changes to the yellow oil indicator with the RPM and tilt indicators remaining as they were.
The remote oil tank is full and after running tests based on the information in this forum, I've found the following:
1. Although the yellow indicator is lit, oil will transfer from the remote oil tank to the engine oil tank at key on and as called for by the engine tank switches.
2. Jumping the black and black/red wires at the remote oil tank does not change the yellow indicator to green.
3. There is continuity between the black/red wire at the remote oil tank and the green to green/white connector at the tachometer.
4. There is continuity between the black wire at the remote oil tank and the negative terminal of the battery.
5. If I disconnect the green, green/red harness from the engine from the green/white, green/red connector on the tach, when the key is turned on, all three oil indicators light, 88 is displayed on the RPM gauge and all trim bars light during the test period (I think this is the normal test period indication). The display then changes to the same indication: yellow, 0 RPM, one trim bar.
6. If I jump the green/red wire on the tach to ground, the red indicator lights. It's my understanding that this is the correct behavior.
7. If I jump the green/white wire on the tach to ground, nothing changes (the yellow indicator remains lit). I believe the green indicator is supposed to light.
I think I've conducted all the tests relevant to this problem and the precision blend system that are described on this forum. I'd greatly appreciate any additional insight or advice.
Upon turning the key to the on position, the red oil indicator flashes four times, a 0 is displayed on the RPM gauge and one bar is illuminated on the tilt indicator during the test period. It then changes to the yellow oil indicator with the RPM and tilt indicators remaining as they were.
The remote oil tank is full and after running tests based on the information in this forum, I've found the following:
1. Although the yellow indicator is lit, oil will transfer from the remote oil tank to the engine oil tank at key on and as called for by the engine tank switches.
2. Jumping the black and black/red wires at the remote oil tank does not change the yellow indicator to green.
3. There is continuity between the black/red wire at the remote oil tank and the green to green/white connector at the tachometer.
4. There is continuity between the black wire at the remote oil tank and the negative terminal of the battery.
5. If I disconnect the green, green/red harness from the engine from the green/white, green/red connector on the tach, when the key is turned on, all three oil indicators light, 88 is displayed on the RPM gauge and all trim bars light during the test period (I think this is the normal test period indication). The display then changes to the same indication: yellow, 0 RPM, one trim bar.
6. If I jump the green/red wire on the tach to ground, the red indicator lights. It's my understanding that this is the correct behavior.
7. If I jump the green/white wire on the tach to ground, nothing changes (the yellow indicator remains lit). I believe the green indicator is supposed to light.
I think I've conducted all the tests relevant to this problem and the precision blend system that are described on this forum. I'd greatly appreciate any additional insight or advice.
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