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Old 12-10-2012, 10:21 AM   #1
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Stop lights and jeeps

Does anyone have issues at certain stop lights not picking up your jeep ill sit at some for ever and sometimes just have to run then

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Old 12-10-2012, 10:29 AM   #2
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Sounds like your not triggering the loop. Are you lifted? I am not ānd never had that problem. Now if only the red light cameras didn't see me? LOL

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Old 12-10-2012, 10:29 AM   #3
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What language is that?
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Old 12-10-2012, 10:30 AM   #4
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Quote:
Originally Posted by Atthehop
Sounds like your not triggering the loop. Are you lifted? I am not ānd never had that problem. Now if only the red light cameras didn't see me? LOL
Yes I'm lifted and it is only on the ones that doesn't have the cameras it's hard driving late since nobody will pull up behind me to trigger it
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Old 12-10-2012, 10:53 AM   #5
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That happened to me frequently when I drove an early CJ5 with a lift and fiberglass tub

With the steel-bodied LJ and 3" lift, I've never had that problem.
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Old 12-10-2012, 10:57 AM   #6
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Are you pulling forward to far? That'll make that happen. Could be just the sensors in the road. There is a light where i live and it has two turn lanes and if Im in the left one it works just fine but if im in the right one it would work untill someone pulls up behind or next to me. Ive seen it happen with other cars.
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Old 12-10-2012, 11:02 AM   #7
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I have this problem at certain lights in town too. Not sure what would cause it though.
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Old 12-10-2012, 11:19 AM   #8
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The "triggers" are sensors that detect electronic pulses. Any lifted vehicle may have a problem. Motorcycles would not trigger them at times on the older units, but the new units detect motorcycles well. There is a unit available for motorcycles that emits a pulse to trigger the light, and I'm sure they would work in a vehicle also.
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Old 12-10-2012, 10:45 PM   #9
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The vast majority of these devices are passive inductance..... they sense a change in ferrous metal just above the road surface. Motorcycles and lifted vehicles do not present a "large enough" shift in inductance. The signal, when amplified, is not significant enough to cause the downstream circuitry to "sense" the vehicle.

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Old 12-10-2012, 10:48 PM   #10
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This happened to me at a left turn lane the other day. I thought the light was bad and ran it... Interesting
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Old 12-10-2012, 10:53 PM   #11
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I've heard of a trick used for mopeds and motorcycles that might work. Since they're too light to hit the sensor, some people would put a couple strong neodymium magnets on the undercarriage and it sets off the weight requirement to trigger the light. I'm not sure if it would work on a jeep but it probably wouldn't hurt to try if you were really desperate.
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Old 12-10-2012, 11:07 PM   #12
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Old 12-10-2012, 11:38 PM   #13
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This doesnt happen at lights, but it does happen at the gate to my community. It sucks because the guard doesn't have a button for the outgoing gate. So I have to sit there and wait for someone to pull up behind me or go around through the inbound gate.
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Old 12-10-2012, 11:46 PM   #14
Knows a couple things...

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It's not happening because you're in a Jeep. Traffic signals are controlled by sensors buried in the street that are triggered by ferrous (magnetic) materials... like steel & cast iron. If you compare how much steel & cast iron are in our Jeeps (especially our axles) compared to the typical econobox unibody crackerbox cars, you'd know that our Jeeps are far more likely to trigger/be picked up by those sensors than a normal car is. Even when we have big tires lifting the axles up a couple additional inches.
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Old 12-11-2012, 12:34 AM   #15
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Funny, ive had to run two lights recently on a turn lane late at night. I let the lights cycle 5-6 times before I said screw it. Being late at night there are no other cars to come trigger the sensors behind me. Also ive made sure I was over the wires on the road but I got nothing. I have a 4" lift.
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Old 12-12-2012, 07:34 AM   #16
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Quote:
Originally Posted by Jerry Bransford
It's not happening because you're in a Jeep. Traffic signals are controlled by sensors buried in the street that are triggered by ferrous (magnetic) materials... like steel & cast iron. If you compare how much steel & cast iron are in our Jeeps (especially our axles) compared to the typical econobox unibody crackerbox cars, you'd know that our Jeeps are far more likely to trigger/be picked up by those sensors than a normal car is. Even when we have big tires lifting the axles up a couple additional inches.
Sorry my post made it seem like it was only a problem for a jeep u learned about how they pick up metal years ago lol I was just hoping I wasn't the only one with this problem I'm on a military base and there are cops everywhere so it gets risky to run them

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