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Electrical MSD 2 Step and Relay

  • Thread starter Thread starter RangerJoe
  • Start date Start date Dec 29, 2012

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
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Georgia
Dec 29, 2012
#1
  • Dec 29, 2012
  • #1
Hey guys, going to try getting around to installing my 2 step that I've had lying around for a few months. I'm going to to wire both it and my linelock to be "deactivated" upon release of the clutch pedal. The MSD instructions call for using a "Latching Relay" and provide their part# of 8961 for their relay.

My question is this: What is a "latching" relay? Is there relay any difference between this relay and a regular relay I can buy at the parts store or Radio Shack? I actually have a couple of 5 prong relays left over from a previous project.

Thanks for any help!

Joe
 

CarMichael Angelo

my rearend will smell so minty fresh,
15 Year Member
Nov 29, 1999
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Birmingham, al
Dec 29, 2012
#2
  • Dec 29, 2012
  • #2
It's simple, but from what I read MSD wants you to use their 8960 DP/DT relay instead of what you have. Id personally just use one relay for the LL, and another dedicated to the clutch switch, w/the 12v signal wire that goes to (pin 85) on both relays split from the button you press for the LL.
That way there'll be no need to buy their fancy smancy version of the same.
 

gearheadboy

15 Year Member
Jan 15, 2003
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Greencastle Pa
Dec 29, 2012
#3
  • Dec 29, 2012
  • #3
I was gonna wire my line lock and 2 step the same way. But I ran into an issue..my car was originally an AOD car and has no clutch switch currently.
 

jrichker

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Dec 29, 2012
#4
  • Dec 29, 2012
  • #4
A latching relay holds the main contacts closed even if there is no power on the relay coil from the circuit that operates the coil. A regular relay releases the contacts when power is removed from the relay coil.
 
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