Hello all,first time poster. I have a 99 Bonneville SE. The problem is when the key is turned to the ON position, none of the lights on the dash come on. Of course when turned to the START position, it will not crank either. Have checked the battery wire connections and all fuses and all seems fine.
What else I have found is:
1. All accessories that do not rely on the key position work, ie. lights, interior lights, horn, trunk release, etc.
2. When key in ON, the radio and wipers will work. The turn signals will not.
3. When turned to START, I can hear a relay under the dash click.
4. Same conditions in either Park or Nuetral.
5. Security light does not come on nor flash at any time. None of the dash lights come on.

Thought it might be the ignition switch but do not have a wiring diagram. I found the following on another site, can someone verify the wire colors.
Red - power in
Yellow - starter
Pink - ignition
Brown - ignition 2
Orange - accessory
Could not find info on the other wires going to the switch under the dash.

Have power on the red. With the key in ON, there is power on the brown wire but not on the pink. When turned to START, there is power on the yellow.
Any help appreciated especially what wires to diagnose and where they are located. Should the pink wire be hot when key is ON?

Need to check and test both battery cables on both ends, clean them good.

https://www.gmforum.com/t279492/
https://www.gmforum.com/t279494/

[QUOTE=Danthurs;1392655]Need to check and test both battery cables on both ends, clean them good.[QUOTE]

As mentioned, I already did that. Battery is good too. Also verified I have good ground on the engine and body back to the battery.

Did you test the cable it'* self? They can corrode on the inside and cause the problems you are seeing.

Yes I did pull back the boots and checked the wire ends for corrosion. Also checked the impedence and that was good as well. Checked that both sides of the MaxiBus has power.
Checked the circuits at the fuse box on the drivers side. When the key is ON, I verified that the radio and wiper circuits are hot. Also verified that the turn signal, Misc Engine Controls, and the Transaxle circuits are indeed not hot when the key is on. I did not check all circuits on the block but enough to prove that some circuits are hot and others are not when the key is on.

I have the FSM for the 99 model, yes the pink wire should be hot in run . Pm me if you want a pic of this schematic.

Thanks BonneFan, I'll take you up on it. My post count is not high enough to be allowed to PM so I left you a visitor message on your profile.