Line Lock Light

67Dart273 said
On a side note, over the years I've been a party to at least 4 or more Hurst brand Lineloc failures, and I believe they "can't stand" duty cycle

First one I ever saw was my friend who later had and later sold me the 70 RR. First time was he had bought a NOS from a friend and we put it in his then 65 Chevelle, and later he installed it in the 70 RR 440-6 he bought new. That lineloc failed, and when I bought the car, the second one failed for me later on

I had put a new one into my old Landcruiser and THAT one failed

I've had at least one other friend/ acquaintence that failed one as well

"I hoped they've improved" but I doubt it

One way "you might" extend life if failures are caused by coil overheating, is to experiment with a series resistor and with a large cap on the Lineloc end. This is sometimes used to "speed up" relay actuation

In this circuit, the supply V to the relay or solenoid comes in at left. The relay/ solenoid coil hooks to "Vc" at right

You select the relay to hold the solenoid in, but it won't usually PULL it in as a solenoid/ relay takes more to pull in than to hold in. Then ypu put a fairly large cap on the end, and this gives the relay a "jolt" because the cap will charge up to full voltage, not dropped by the relay The switch must be between the cap and the solenoid, or switched in the ground leg