[Healeys] Could it be the OD Switch?

Carlos Cruz healey3000bn7 at yahoo.com
Sun Oct 11 14:39:09 MDT 2009


Fellow Listers - particular those well versed in all-things-OD...

Now that I've completed the installation of new insulation in the cockpit and before I reattach the transmission cover I thought I would once again turn my attention to troubleshooting the OD.  Some of you may recall several weeks ago I solicited help on adjusting the OD given the adjustment lever instructions in the manual weren't working for me.  A couple of you responded with great advice and step-by-step instructions on how to adjust the the setting.  That worked like a charm.  It worked great during a test drive without the transmission cover in place.  I drove it again after buttoning up the interior - DAMN! no OD.

Fast forward to today.  The solenoid is new and only has two miles on it.  I am not getting power to the OD solenoid.  I have the tranny cover off again. With the ignition on and the transmission in top gear, I have power going to the toggle switch in the off position and no power coming out - exactly what you would expect.  Turn on the toggle switch and I now have power coming from the toggle switch down to the the OD switch (#32 on the Key to the Gearbox Components diagram page FFF.5 in the manual) via a white/green wire.  Through the process I can hear the relay operate.  Turning off the toggle and depressing the accelerator the relay is heard again.  I believe the relay is working fine.

There is no power coming out of the OD switch in either the white or white/purple wire going to the OD solenoid.  I am assuming that there should be power coming out of the OD switch to the OD solenoid when the toggle switch is on.  Is this correct?  Is the fact that nothing is coming out of the OD switch when the toggle switch is on, an indication that the OD switch is faulty?  

Any troubleshooting advice is greatly appreciated.  Thank you in advance for your help.

Cheers,
Carlos Cruz

PS:  I have an all new appreciation for you old guys and your eye sight giving you problems reading those electrical diagrams in the manual.  I need to get my hands on some Austin Healey magnification goggles.  


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