pesky inertia switch.

[jlessard]

Now I know there's a feature where if you hit something hard the hazards are supposed to turn on, but my inertia switch is way way way to sensitive.
It will even go off on the metal joints on bridge sections sometimes. And them I'm left driving down the highway with my hazard lights on looking like a moron.
So basically my hazard lights just turn on whenever they feal like it, sometimes I can go a few weeks, and sometimes it will happen a couple times a day.
What can I do to fix it?

 

[anthony]

take it out

 

[DiscoDino]

And how do you do that Anthony without affecting the whole truck's "brain" system?

 

[madmole]

Its not the inertia switch properly then, its main job is to also cut out the fuel pump, so if you are carrying on driving its definately not doing what it should. The indicators is just secondary and is controlled by the BCU unit

ie the impact sensor just sends a signal to the computer, the computer should cut the fuel and turn on the indicators, so if one is happening its a BCU (Body Control Unit) problem

Rovacom and testbook give you the option of turning the indicators on or leave em off when then inertia switch triggers

 

[jec]

At least on a D1, the inertia switch that triggers the flashers is "incorporated in the theft alarm unit" and has nothing to do with the fuel inertial cutoff switch on the firewall, which is self-contained and has its own inertial switch. Just because the theft alarm inertia switch turns on the flashers does not mean that your fuel pump should turn off - two separate cricuits. So to cure the flasher problem you could think about replacing the theft alarm unit (although it may be pricey), or try the reprogramming fix.
John