Starter Relays, I recommend them on all cars now |
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Starter Relays, I recommend them on all cars now |
McMark |
Nov 10 2013, 03:16 PM
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#1
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I've been meaning to post this for awhile and Andyrew's recent starter thread inspired me. I used to recommend against a relay at the starter because it was always known as a 'hot start' relay, and hot start issues can be a sign of a wearing starter. So I considered the relay to be a baind-aid to avoid have to really fix the problem - a bad starter.
Jamie (JRust) was having some ignition switch issues and I started to rethink my position on the starter relay. I realized that the crappy reproduction ignition switches that are available now are prone to failure from having too much current pushed through them. They simply aren't built with enough focus on quality to stand up to the way Porsche/VW designed the starting system. So now I recommend a starter relay on all cars in order to avoid undue stress on either old, tired factory ignition switches or crappy reproduction switches. This can be any 30A or larger relay and Bosch sells a starer relay kit, but I didn't like some of the choices they made, especially because it's sold as a universal kit, which means it doesn't fit nicely on anything. So I put together my own kit designed specifically for our cars. I also found a relay that has a fuse built in, rather than a separate unit. A starter relay can be made with pieces available from your FLAPS, but for those of you who don't feel like going that route, I've made a few of my setup available for sale. This thread is more about sharing information though, so I'll exclude the details here. Attached image(s) |
type47 |
Nov 14 2013, 05:53 AM
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#2
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
30 and 87 is the circuit that you want to supply power to. One terminal (30 or 87) will be connected to the starter solenoid and the other to +12 V (starter terminal from battery). 85 and 86 is the control of the relay circuit. When not energized, circuit is open. Connect either 85 or 86 to the wire from the ignition switch (likely to be yellow with female spade connector), the other terminal to ground. When the key is turned to start, the control circuit closes the relay and that circuit provides power to the starter solenoid.
Here's a "Ford" relay with terminals/connectors: the spade connector to solenoid is a female connector and the spade connector to ignition switch is a male connector. All the ring terminals in the above diagram (connections on the relay terminals) will be replaced with female spade for your relay. Would you detail manufacturer and PN of your relay? |
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