i have an 53 reg daf lf 55 220 the handbrake warning light works intermittently,when stationery the engine revs wont increase on the stalk, guess because the handbrake light isint on,
have been told the handbrake light is controled via the air dryer and this might be faultly ???

daveboy, September 2012

new switch fitted all ok thanks

daveboy, August 2013

o/s/r of chassis ,roughly above the axle .its a relay valve with a switch in it

norb, September 2012

thanks for info, can you tell me where h/brake relay valve in on vehicle thanks

dave, September 2012

if the handbrake light isn't working ,personally i would check the switch and the wiring on the park brake relay valve...
whoever told you the switch is controlled by the air drier/ apu is getting confused...on 75 85 95 and 105 .if the handbrake doesn't release and the light stays on then the airdrier /apu is generally faulty ..but from your fault description ,it sounds like switck or wiring

norb, September 2012