I have a Jeep patriot 2.0crd manual 2007 with 4wd. Since i bought it i have never used the 4wd switch but yesterday i did a bit off roading. I switched off the esp by holding the button for 5 seconds until 'esp off' appeared on the dash and pulled the 4wd switch. No 4WD indicator light appeared on the dash. Apparently the 4wd switch does nothing. The button/switch lights green when I turn on the headlights but when I pull it, no inicator appears on the dash to inform me that 4wd is engaged. Could you help please?