sometimes my wait to start light does not come on when first activateing the key to the on position,however the truck will start. Then sometimes when driving along and after the engine is warmed up the wait to start light will come on. I have done some radio work in the area of the info center wireing could this possibly loosen a wire ? or should I be looking for another solution? This problem arises when temps are quiet high above the normal ambient temp range needed for the intake air heaters to activate. This is happening on a 89 reg cab auto stock 120k. new to the forum I have been reading it for about a year and just now trying to post . im not a computer guy but maybe that will change. This a great org. and site would appreciate any help or suggestions tks.