If it is bad battery connections then this will happen:

You get in the car, turn the headlights on, and turn the key to start - the starter solenoid engages and the LIGHTS DIM WAY DOWN.

If it is not bad battery connections then this will happen:

You get in the car, turn the headlights on, and turn the key to start - and the lights don't dim at all.


If it isn't the battery connections, I'd yank the RCM and get the solder reflowed at every suspect (or to say it another way, "cracked") pin on the board. It CAN be the contacts on the Engine Control relay but usually it's the solder around the pins that feed A+ to the PTCM.