Quote:
Originally Posted by joedoh
could you use a pair of relays and tap into the brake wire as a latching input, so that when you tap the brake the overdrive disengages? if the brake wire isnt the desired input you could put a brake switch on the clutch pedal and do the same thing. I can help you design that circuit if needed.
a relay is a low current to high current switch, it doesnt need a "ground" and no pin is required to have 12v "hot all the time"
looking at the bottom of a relay there are 3 vertical pins and two horizontal pins. the two outside vertical pins (85 and 86) are the low current switch, you can feed ground or voltage to either pin as a switched input, and use the opposite voltage of what is input on the other side. If you use 12v on 85 as your switch input, you will need a corresponding ground on 86. If you use ground on 85 as a switched input, you will need 12v on the other side. Your switched input is really any signal that you would like to energize the relay but is not strong enough or is the wrong polarity to energize the circuit.
The top horizontal and bottom vertical pins (87 and 30) are the high current switch. when 85 and 86 have the right voltage, 87 will be connected to 30. If you supply heavy gauge 12v to 87, when the low current switch is energized that sme high current voltage will be on 30 through connection internal to the relay.
87a, the middle horizontal pin, is to supply a normally open signal to 30. When the relay is not energized, 87a is tied to 30. when the relay is energized 87 is tied to 30.
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If you would use the pole #'s and cross reference them to the colored wires then it might make more sense since no one else can see the #s on the realay itself.......Kieth
Here I went back and looked here is how they are numbered on the relay:
Blue--30 fused and direct to the battery
black 85 ground for relay trigger (low amp) I believe he is using this in conjunction with the govenor, when the govenor completes the ground it allows the OD to be engaged if the switch is turned on. When the speed falls below 30 mph the ground is no longer complete so the relay is turned off and the OD disengages? (is this correct)
White 86 trigger wire for relay (low amp draw) switch activates this circuit
Yellow 87 30 amp 12 volt switched (by white triggger wire) turns the OD on but it only supplies power when the govenor is above 30mph (it does this by controling the relay ground black # 85?
Red 87Q what I referred to as unused since it is powered only when the relay is not switched.......it could provide power to a accessory that needs power when the relay is not engaged lets say a burglar alarm ??
Kieth
