Bosch type relays with positive ground? Related etc.

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Duncan M
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Bosch type relays with positive ground? Related etc.

Post by Duncan M » Mon May 18, 2015 12:31 pm

Anyone using "Bosch" relays for items on their TC?
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Duncan M
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Re: Bosch type relays with positive ground? Related etc.

Post by Duncan M » Fri May 29, 2015 9:09 pm

These relays do not care if it is positive or negative ground. Nothing need be reversed, or anything like that. Only difference is the car is positive ground. So neg power goes to normal "power" leg, and pos goes to normal ground leg, etc.
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Norman Golm
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Re: Bosch type relays with positive ground? Related etc.

Post by Norman Golm » Mon Jun 01, 2015 7:28 am

117-515 is the Moss number of a headlamp kit.
Norman Golm
12158 N Foxview Dr
Northport, Mi., USA
ncgolm@gmail.com

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Duncan M
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Re: Bosch type relays with positive ground? Related etc.

Post by Duncan M » Mon Jun 01, 2015 11:07 am

Yes, they show a neg ground schematic, and use 4-leg relays. I know 5-leg relays work on pos ground, not sure about 4-leg. Moss does not mention pos ground in the instructions. Seems odd. http://www.mossmotors.com/Shop/ViewProd ... rtOrder=10

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Gene Gillam
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Re: Bosch type relays with positive ground? Related etc.

Post by Gene Gillam » Mon Jun 01, 2015 12:11 pm

Polarity should not matter on mechanical relays.

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Duncan M
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Re: Bosch type relays with positive ground? Related etc.

Post by Duncan M » Wed Jun 10, 2015 11:32 am

Yes, polarity no matter. Though, apparently, some of these relays have some sort of diode across the input and ground. I could not tell you which ones.
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