HAVE CODE 26--CHECK RESISTANCE ON INJECTORS, EGR

First, did you clear the computer after you worked on it? I see the code can also go for the Coolant fan relay and the A/C relay. You did check the EVAP system for resistance but does it work consistently? Same thing for EGR.

Anyway, try these 2 relays I mentioned and let us know if it helped.

There's a lot of information regarding your problem here:

http://www.saturnfans.com/forums/showthread.php?t=284

My suggestion would be to contact a local dealer and have them run the diagnostic (usually under $100), then if the part is easily replaceable, do it yourself. If it's more involved, then bargain with the dealer on a good price to have the problem fixed.

I truly hope that the Quad Driver itself isn't what's causing the code.

Just because you have a Quad driver code doesn’t mean the Quad driver is bad. All a Quad driver code means is that an expected value is not present when it’s suppose to be. Also a Quad driver is a techy name for 4 on-off switches arranged in a group, hence the name Quad driver. The computer watches the voltage values on each switch and knows that if the switch is on, a voltage value will be seen. When the switch is off the opposite voltage value will be seen. Simply put, light on, light off. So what can set a quad driver code? You’d be surprised. How about a bad bulb? How about a bad fuse? The answer is yes to both questions. Yes, a bad bulb or failed fuse can set a Quad driver code. Start with checking your fuses. There can be up to 3 fuses that supply power to circuits controlled by the Quad drivers. If the fuses are good the next check would be of all or some of the following, depending on how your vehicle is equipped: Up shift light bulb, coolant hot bulb, shift to drive bulb, A/C relay, coolant fan relay, EGR solenoid, Canister Purge solenoid, even a speedometer output signal goes to one of the switches on the Quad driver. It’s more likely that the Quad driver code is present because the computer is not seeing the information that it expects to see at one of the switches.

Quad/Output Driver Module:
The Control Module in this vehicle controls most components with electronic switches which complete a ground circuit when turned on.

When the switches are arranged in groups of 4, they can independently control up to 4 outputs and are called Quad Drivers.

When the switches are arranged in groups of 7, they can independently control up to 7 outputs and are called Output Drivers.

Not all outputs are always used.

the most common issue i have seen with this code is the cooling fan circuit and / or a/c circuit. very common to have bad temp sensors also. hope this help you. let me know what you find and i can help more.