Whenever a driver gets an\u00a0ABS Warning Light the first thing that is thought is that the fault is with the trailer. But is it really?
\nThe driver will then state that when he connects to other trailers the ABS warning light doesn’t come on, so it must be the trailer!<\/p>\n
So how do we quickly determine if a fault is with the truck or the trailer?<\/p>\n
ISOCheck is a test lead that will quickly and simply identify if all the electrical power information is being outputted from the truck correctly, if so a bright Green LED Ring will light, if not a Red LED Ring will light, then testing the trailer and truck together the information sent from the trailer is checked.
\nThis product will save time in calling out the correct truck or trailer repairer to warning light activations and is ideal to check the ISO socket on inspection intervals.<\/p>\n
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Hours\u00a0could be\u00a0spent looking at the trailer or truck, a simple test of the ISO socket would save so much time.<\/p>\n
Trailer hire companies often have the problem of customers picking up trailers\u00a0and once the truck has been\u00a0connected the Warning Light has been activated, the driver will straight away\u00a0blame the trailer\u00a0as having a fault.<\/p>\n
Hours may have been spent preparing the trailer and then a\u00a0question will occur is\u00a0it the\u00a0trailer or the tractor unit?<\/p>\n
With ISOCheck the discussion will be short and the fault will be identified as the truck or the trailer!<\/p>\n
<\/p>\n
Furthermore below is a recent case study of a rare warning light problem.<\/p>\n
This\u00a0case study highlighted a potential problem that all commercial truck and trailer operators could meet.<\/p>\n
This particular problem\u00a0relates to\u00a0a truck having a LCD or dot matrix electronic dash and the power to Pin 5 in the ISO Socket is being fed from the dash. This is OK if the trailer has an Electronic Braking System fitted but if the trailer has certain makes of ABS then the trailers ECU needs to see 24 volts at pin 5 but the truck in some cases will be only sending 5 volts or less to pin 5. ABS Warning Light Fault Example<\/p>\n","protected":false},"author":3,"featured_media":908,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-954","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","entry","has-media"],"yoast_head":"\n
\nSo why is this causing a warning light fault?
\nCertain older types of ABS will ground pin 5 when it sees 24 volts coming down pin 5 (the warning light wire), turning the warning light on in the truck.\u00a0Most\u00a0ECU’s will do a static self test of all connected components and if all is OK the ABS systems ECU will remove the ground to pin 5, which turns the warning light off in the truck.
\nSo this sounds OK but if the truck has an LCD dash and the warning light is basically an LED,\u00a0then there is not enough load on pin 5 to draw it down to ground and the light stays on.
\nOlder trucks have a 5 watt bulb for the warning light and the bulb is what makes the system work correctly.
\nA good example of this was reported by a commercial repairer recently, while working on a Renault Magnum with a Haldex Modal ABS trailer, no faults were reported on the trailer but the warning light on the truck would not turn off even after it had been driven. The only way to cure the fault was to put a 5 watt load on pin 5 on the trailer, so this will make the trucks dash work correctly.
\nYou can read further at\u00a0ISOCheck<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"