Re: 48 49 50 Backup Lights
Posted by HH56 On 2011/1/30 15:25:25
The switch was a change for units with R9 OD and was suggested to retrofit if needed. If a governor or something else in part of the wiring shorted, OD would stay engaged. If car placed in reverse while engaged, R-9 OD would lock up and could be damaged. The switch broke the power to the OD when in reverse to force it to drop out if something was wrong. Changing to the R-11 OD in 49 solved that issue so no need for that particular switch again.
The two terminals for the OD are not used in your case, and can just sit there. They won't be live. With the switch at rest, they (OD) are connected together as a normally closed set and back two (Back Up) are normally open. When you select reverse, the front two open up and back two connect together. They are totally independent sets of contacts.
Hook up the back up lights per the schematic here using the two terminals labeled back up light. I would use a 5 amp fuse as that's plenty for a single light. All you're doing is protecting the wiring.
If you want to get the proper switch that was on the 50 Ultra or most R-11 OD cars, one is shown in the picture. Max Merritt has them but a bit spendy to do the same thing you already have. That switch is essentially the same as you have without the two extra terminals.
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The two terminals for the OD are not used in your case, and can just sit there. They won't be live. With the switch at rest, they (OD) are connected together as a normally closed set and back two (Back Up) are normally open. When you select reverse, the front two open up and back two connect together. They are totally independent sets of contacts.
Hook up the back up lights per the schematic here using the two terminals labeled back up light. I would use a 5 amp fuse as that's plenty for a single light. All you're doing is protecting the wiring.
If you want to get the proper switch that was on the 50 Ultra or most R-11 OD cars, one is shown in the picture. Max Merritt has them but a bit spendy to do the same thing you already have. That switch is essentially the same as you have without the two extra terminals.
Attach file:
(20.27 KB)
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