Re: R11 Overdrive characteristics?
Posted by HH56 On 2017/1/16 15:56:38
If after doing the checks O_D suggested the OD still does not appear to be functional check a few spots on the electrical side. All are done with the engine off, car sitting, and OD knob pushed in.
In step 1 you should have 6v to ground on both sides of the fuse at all times. Sometimes the fuse holders oxidize and cannot carry the current needed for the solenoid..
Step 2: turn on the ign switch and with OD knob in you should have voltage at the relay ign terminal. If no voltage, the lockout switch has been a known failure item due to wear on the switch plunger.
Step 3: If you have voltage at both places, check the relay by momentarily connecting a jumper wire from the indicated terminal to ground. The relay should click and the solenoid should clunk and try to come in. If the relay clicks it is OK. It may be hard to hear the solenoid over the relay so if you do not hear the solenoid, remove the temporary jumper from ground and connect the meter to the relay out contact. Touch the jumper again to ground and when relay clicks verify there is voltage at the relay out contact. If there is voltage, providing the wiring is good, the solenoid should be getting power. If no voltage out, the relay contacts are known to oxidize.
If everything electrical checks out at the relay and still no OD then there could be governor, kickdown switch, or wiring problems preventing the relay from getting a signal to energize. If relay is energizing but no solenoid, wiring or the solenoid could be at fault...There is a set of contacts inside the solenoid that needs periodic servicing or solenoid could be burned out .
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In step 1 you should have 6v to ground on both sides of the fuse at all times. Sometimes the fuse holders oxidize and cannot carry the current needed for the solenoid..
Step 2: turn on the ign switch and with OD knob in you should have voltage at the relay ign terminal. If no voltage, the lockout switch has been a known failure item due to wear on the switch plunger.
Step 3: If you have voltage at both places, check the relay by momentarily connecting a jumper wire from the indicated terminal to ground. The relay should click and the solenoid should clunk and try to come in. If the relay clicks it is OK. It may be hard to hear the solenoid over the relay so if you do not hear the solenoid, remove the temporary jumper from ground and connect the meter to the relay out contact. Touch the jumper again to ground and when relay clicks verify there is voltage at the relay out contact. If there is voltage, providing the wiring is good, the solenoid should be getting power. If no voltage out, the relay contacts are known to oxidize.
If everything electrical checks out at the relay and still no OD then there could be governor, kickdown switch, or wiring problems preventing the relay from getting a signal to energize. If relay is energizing but no solenoid, wiring or the solenoid could be at fault...There is a set of contacts inside the solenoid that needs periodic servicing or solenoid could be burned out .
Attach file:
(83.82 KB)
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