what kind of truck is it a chev 99 to 03 if so the auto 4 well buton is broke dont worry about it unles you have about 600.00 to 800.00 to fix the auto 4 weel just leve it in 2 high then when you need 4x4 put it in 4 high.
The light that comes on when 4 wheel drive is engaged is not the service light. It is just an indicator light that comes on to let you know the 4 wheel drive is engaged. It will go off when the 4 wheel drive is disengaged.
You will have to drive it until it comes on.
That depends on the reason why it's coming on.
you could have a leaky or damaged transfer case.
The computer that controls the 4wd has detected a problem and set a trouble code.
why is my service 4 wheel drive light on on my 2008silverado
If the green lights go out for the 4 wheel drive and the yellow light comes on in an Infinity QX4, there could be a problem with the transfer case. There could also be a problem with the 4 wheel drive not engaging when it should.
if the transaxle light comes on in the car can you still drive it
There are several reasons why a service engine light comes on in a 2005 Nissan Pathfinder. A few reasons could be a loose gas cap or the fuel sensor.
If the light is not flashing you can drive it until you can have it repaired. If the check engine light is flashing, park it. Otherwise you will do catastrophic damage to the catalytic converter costing several hundreds of dollars to replace.
It is possible that your alternator might be going out. It also could be a problem with your battery. You should have it checked by a professional or you could be stranded .
A reset Engine Service Light comes on when an issue comes up with in the engine. This light can be reset by a tech or by fixing the problem.