L-Jet Relay Board Question, Using I and IV to bump the starter ? |
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L-Jet Relay Board Question, Using I and IV to bump the starter ? |
jim_hoyland |
Jun 17 2012, 11:33 AM
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#1
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Get that VIN ? Group: Members Posts: 9,319 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
The L-Jet doesn't use the 4 wire connector at the rear of the relay board. like the picture below A yellow wire from the dual relay attaches to II or IV ( they are linked ).
Spade I is hot when the key is on; but it's not used on the L-Jet. Can I mount a momentary switch between Spade I and Spade IV to bump start the engine. I think Clay Perrine brought this up once upon a time. Attached image(s) |
Tom |
Jun 17 2012, 12:44 PM
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#2
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
Jim,
While that would work electrically, the high currrent may be too much for the power relay. ? Not sure of the current rating on these relays for the relay board. The relay provides the power to #1 of the 4 pin socket. According to Haynes, the pullin current for the starter solenoid is 35 amps, hold in is 11 amps. That was the reason I used a 50 amp relay for the bump/hot start setup on mine. The current to drive the relay I used is 135-150 miliamps. Also using this as a bump feature without a relay using low current will accelerate wear on the switch contacts due to the inductive spike. That is what the diodes are for on the one I made up. Usually, relay contacts are made from a different material that handles inductive spike better than switch contacts. Tom |
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