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Thread: Relay Diagrams
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Old 02-04-2013, 06:04 PM
ween ween is offline
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hi,
although i haven't seen lately, some older bosch relays do have a suppression diode across terminals 85 and 86. in that case terminal 86 is the positive and 85 is the negative. wire it backwards and you get a short circuit, blown fuse, smoke let out of the electronics module controlling the relay, etc...not a good thing. the nice thing is that bosch did put a little symbol for the diode on the case of the relay to show that there is one present. if you sourced relays from used vehicles, gm i know did have them back in the 90's, couldn't hurt to look.
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