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11-30-2016, 10:46 AM
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#1
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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TPMS Interference
I have had the TST 507 system for several years with great results. However, with my 26' enclosed trailer, I get sporadic reporting. I added a booster three years ago when I started pulling this trailer. The company suggested that the booster and monitor could be picking up interference from the alternator, remote thermometer, Atomic clock, etc as the frequencies are close. The booster is located high above the rear hatch opening. After 30 minutes with no update, the monitor will alert me. When I stop, and shut the engine off, it will update in a couple minutes, so something is interfering with the sensor signals.
What are others with the TST system doing??
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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11-30-2016, 01:59 PM
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#2
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Senior Member
Join Date: Feb 2013
Location: Wandering
Posts: 635
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We have the atomic clock, refer transmitters, remote thermometer...no issues.
Are your batteries fresh?
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2014 XLR415AMP Thunderbird ToyHauler, 2019 Sandpiper 379FLOK, F350 Lariat Diesel DRW, NRA Benefactors FullTime RV'er KN4YBP General License
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11-30-2016, 04:19 PM
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#3
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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I put new batteries in all of them in Sept. I thought I might have a bad sensor, so reprogramed and exchanged it with one from the front tires. Same result. the rear right trailer position will not report regularly when traveling. It will report just fine even when it is parked over 100' from the motorhome, so I know it's a good sensor. Something is interfering with monitor/sensor communication when the engine is running.
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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11-30-2016, 04:22 PM
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#4
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Senior Member
Winnebago Owners Club
Join Date: Aug 2013
Posts: 1,636
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Key issue you solved yourself, you shut off the engine and all is well. Tr moving the booster to the other side of the coach there in the rear, or even mounted on the fronbt of the trailer to move it further away from the alternator.
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2012 Journey 40U (Our Incredible Journey)
2008 Dodge Dakota(TOAD) 2005 Honda Shadow in TOAD
AF-1 braking system
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11-30-2016, 07:52 PM
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#5
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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Quote:
Originally Posted by D Lindy
Key issue you solved yourself, you shut off the engine and all is well. Tr moving the booster to the other side of the coach there in the rear, or even mounted on the fronbt of the trailer to move it further away from the alternator.
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I did move it to the right rear corner near the tail light assembly and it made no difference, so put it back in the upper center area. I wonder if there is a filter or suppressor that could be wired to the alternator much like we used to do for cb radio noise 40 years ago.
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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11-30-2016, 08:12 PM
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#6
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,248
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I mounted my booster in the bathroom which is mid coach. I don't have any problems. Try putting your booster on some alligator clips so you can move it around in your rig to different locations and see if that helps.
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Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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12-01-2016, 03:44 PM
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#7
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Senior Member
Winnebago Owners Club
Join Date: Aug 2013
Posts: 1,636
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You can go to Radio Shack and by a 12v noise filter. I used them with CB radios to cut out the alternator noise. The filter is a simple wire in line with the 12v power wires affair. The cost of them is negligible so nothing ventured nothing gained.
__________________
2012 Journey 40U (Our Incredible Journey)
2008 Dodge Dakota(TOAD) 2005 Honda Shadow in TOAD
AF-1 braking system
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12-01-2016, 05:00 PM
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#8
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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Thanks. I'll try moving it and also the filter. When I called TST, she said when they install the systems, they put the booster in the battery compartment and it works well. My compartment is behind and below the driver. It's only 8-10 feet from the monitor, but they claim it does the job.
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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12-01-2016, 08:47 PM
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#9
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 23,912
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"Crasher".....I would try moving it closer to the front of the coach. I bought the TST 507 unit and found that it was dropping out and alarming every so often. I was told the same thing by TST, about the thermometer and other interference. I disconnected everything using a signal and still had the issue. My coach is 40' long and finally bought the repeater. I mounted it mid coach, on a bay wall, next to some 12 volt power. All is working fine. I can't give you technical reasons, but I think the repeater needs to be closer to the dash unit than the furthest tire.
__________________
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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