2003 450 es
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I don't know the mechanism that controls that function, but if I had to guess there is a relay or solenoid down in the transmission controlled by that switch.
So, with that in mind, I don't think it's a good idea to engage that relay/solenoid full time. And, it's a safety feature....AND, are you sure the switch is the problem or is it something else?
So, with that in mind, I don't think it's a good idea to engage that relay/solenoid full time. And, it's a safety feature....AND, are you sure the switch is the problem or is it something else?
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By looking at the wiring diagram, it appears that it might work as long as it don't send an error code to the ES control unit and cause it not to shift. You could try and see if it would work. I don't think it would hurt anything.
According to the wiring diagram, it's just a normal switch that's either open or closed. If it won't shift, then just switch it back. The only other thing that I can think of that would cause it not to work would be if the 450 has a reverse rev limiter, but I don't think it does. If it does have a reverse rev limiter, then the rev limiter will kick in at low RPM, even in forward gears.
According to the wiring diagram, it's just a normal switch that's either open or closed. If it won't shift, then just switch it back. The only other thing that I can think of that would cause it not to work would be if the 450 has a reverse rev limiter, but I don't think it does. If it does have a reverse rev limiter, then the rev limiter will kick in at low RPM, even in forward gears.
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23,587 Posts
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23,587 Posts
After thinking a little more about it, Pain is probably right. It looks like one of those wires runs through the ECU and it might not be a good ideal to wire it straight through the switch. You might end up damaging the control unit. It would be a lot cheaper to just buy the reverse switch than it would be to replace the ECU. If it wouldn't have been an ES model, it wouldn't have been so bad.
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I can't read the pin on the electronic control unit that is controlled by that switch, but it's definitely wired into the ECU.
I don't think it would harm anything to test it by shorting those wires, but I wouldn't hard wire it full time. If it is the switch, just replace it.
ADDED: Yeah, what he said ^^^^^
I don't think it would harm anything to test it by shorting those wires, but I wouldn't hard wire it full time. If it is the switch, just replace it.
ADDED: Yeah, what he said ^^^^^
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