Line Lock LED SOLVED!

fleming442

fleming442

Rocket Powered Basset Hound
Dec 26, 2013
10,197
113
I tried to wire in an LED indicator for the line lock and it works intermittently. I tried 2 other LEDs, and same result. If I wire the conventional incandescent bulb it works every time. I put a diode in, and can still feel the kickback off the solenoid on the gated side of it. Any ideas?
 
UC645

UC645

Master Mechanic
Apr 20, 2020
268
93
Kittanning, Pa
It could be the LEDs you’re using, I wouldn’t trust cheap eBay ones to work even they’re 12v rated.
 
fleming442

fleming442

Rocket Powered Basset Hound
Dec 26, 2013
10,197
113
I get that, but the one on the 2 step works and I tried 2 others. A conventional bulb works. It's got something to do with the spike off the solenoid that a diode won't fix. I may have to rob the e-brake indicator bulb out of the Pig.
 
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fleming442

fleming442

Rocket Powered Basset Hound
Dec 26, 2013
10,197
113
Little off subject but I'm not a fan of line locks, had one stick and almost put it in the wall.
Unfortunately, it's a stick, and I'm not talented enough to power brake it.
Use a micro relay.
I thought about that. Trying to get it as close to the solenoid as possible and minimize parts.

I really just want to know why it doesn't freaking work!
 
motorheadmike

motorheadmike

Geezer
Nov 18, 2009
5,241
113
Ottawa, Ontario Canada
Unfortunately, it's a stick, and I'm not talented enough to power brake it.

I thought about that. Trying to get it as close to the solenoid as possible and minimize parts.

I really just want to know why it doesn't freaking work!
A lack of load/resistance. Use a relay.
 
fleming442

fleming442

Rocket Powered Basset Hound
Dec 26, 2013
10,197
113
It's definitely the spike off the solenoid that's screwing with me. I ordered some more "lights" off the Ding How Purveyor, and they're freaking LEDs. Dammit! I did what I was trying to avoid, and put a relay in. The LED indicator works now, but the turn/high beam indicators still flicker when the solenoid disengages. Ima try moving the solenoid ground away, and see what that does. Hindsight being 20/20, I should have grounded the b*tch to the frame.

What really ticks me off is that, of all the doggone, complicated wiring I've done in 30 years, a simple switch, solenoid, and indicator are giving me a straight up fit! GRRRRRR!
 
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64nailhead

64nailhead

Royal Smart Person
Dec 1, 2014
1,275
113
Upstate NY
Too many amps - ohm's law applies. You can use diode but you need a resistor to limit the amps to the rating of your led.

I burnt up about 5 in the Cutty before I figured it out. If they work a couple of times and then quit (forever - burned up), then you need higher wattage resistor. How about some specs on the LEDs your using?

The best part about these things is that the resistors, diodes and LEDs are so freakin cheap. $25 dollars buys a handful of everything.
 
fleming442

fleming442

Rocket Powered Basset Hound
Dec 26, 2013
10,197
113
There's only a 5a fuse feeding both the 2 step and line lock. I know you're old enough to remember when you could get gas grill igniters as gag toys; that's exactly what it feels like. I think it's a voltage spike.

The LEDs are China's finest with no reliable provided specs.
 
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