A single pole single throw normally closed or single pole double throw using the normally closed pole will cross over the binary ground logic from XEDE or UTEC to the trigger needed for the 2d. Just about any normal automotive 5 pin relay will be suitable - most automotive places will have a Bosch or other make around. Look in fog light, auxilarry horn sections since they are usually required for those applications as most switches will not support the draw of those items.
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