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TR3a Overdrive Warning Light
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NevilleT
New User
Oct 30, 2013, 11:32 PM
Post #1 of 2
(1117 views)
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TR3a Overdrive Warning Light
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This is a problem I have been trying to solve for weeks. I have a 1959 Triumph TR3a. It has electric overdrive. There is a switch on the dash to engage overdrive, and switches on the gearbox to only allow engaging o/d on 3rd and 4th gears. The switches trigger a relay which engages a solenoid. On the control side of the o/d circuit you have a power supply to the relay then to dash switch then to the gearbox switches and earth. I want to put in a warning light to show when the dash switch is on. Reason is that if you have it turned on when you start accelerating, you change from 2nd to 3rd and actually go from 2nd into 3rd o/d.
My problem is that if you put in a light you actually earth the circuit and close the relay. Can anyone come up with a creative solution to install an indicator light?
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NevilleT
New User
Oct 31, 2013, 3:30 PM
Post #2 of 2
(1097 views)
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Re: TR3a Overdrive Warning Light
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Solved it myself. Put the switch I want to monitor upstream of the relay so I can put a warning light between the switch and relay. Amazing what you think of when you write down a problem.
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