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  1. The ABS light on the dash has been on for awhile. A popped tire, I think, tore the RF ABS harness. I was too lazy to fix it right away. I had the same problem on a '92 Lumina--RF sensor harness open to road splash. What happens is that water gets inside the insulation of the broken wires, and corrodes the wire down towards the sensor, and up towards the engine compartment. The corroded wire can't be soldered, solder won't stick to it. And it's a mess to clean off with flux and heat. If the wire corrosion is only a few inches, you can cut the section out and splice to clean wire. In this case, the wire was rotted all the way down to the sensor connector, and all the way up to the engine compartment connector. I disconnected that section of the ABS harness at both ends, and opened it up for inspection. There was "no hope", so I visited my favorite Treasure Yard and grabbed a replacement harness complete with the bulkhead grommet that goes through the strut-tower. Wheel sensor end of ABS harness. Note corroded, blackened wire Engine compartment end of ABS harness, almost to the strut-tower grommet. Wire is still corroded black. Replacement harness from Treasure Yard, including grommet and retainer clip where it goes through the strut tower ABS repair entirely successful, I didn't even have to clear any codes. I got in, drove it, and the ABS warning light turned itself off. Scan tool shows all four wheel sensors providing the same vehicle speed to the ABS when I drive. Next repair was due to a plugged air conditioning drain nipple (Duckbill). The condensation wouldn't drain from the evaporator box. When I'd take a left turn, the condensation would slosh into the blower fan and make noise, and also produce "fog" from the A/C vents. If I'd gone under the car, found the silly little drain nipple very near the exhaust downtube, pulled it off and cleaned it, the water wouldn't have corroded the blower-motor resistor pack. Drain nipple, cleaned-out. Pulling this off the stub-pipe on the firewall released about a quart of water--condensation from the A/C evaporator. By the time I got around to attending to this, the resistor connector had corroded so bad I couldn't get it off of the resistor pack, and there was no current flow through the resistors--so the fan speed switch had "off", "off 1", "off 2", "off 3" and "High". Corrosion extends to the underside of the connector. I couldn't get the connector to release--it's corroded together. Getting at the resistors is a bitch. First I removed the interior hush panel on the far right side under the dash (two barbed connections hold it in place) and then there's three screws in the resistor pack WAY forward by the firewall, to the side of the blower motor. The resistor pack faces "up", so there's almost no tool clearance to put a 7/32 socket on the screws next to the firewall. Once I removed the corroded resistor pack I clipped the wire harness a few inches from the connector. Again, the Treasure Yard supplied a replacement resistor pack and connector, with eight inches or so of wire harness. I connected the replacement harness to the vehicle harness using a 4-prong weatherpack connector pair. I could have soldered the wires directly, or crimped them without a connector. Lastly, I decided that perhaps I should check the engine air filter. No special reason, but I know I haven't done it in years. Pulled an entire mouse-nest out of the filter box. Car would still go 70 mph +. There really didn't seem to be a problem with performance--but perhaps the next drive with a new filter will show improved performance I didn't know I was missing. I gotta stop procrastinating on vehicle maintenance. Each of these issues was made worse by not taking care of things right away. Next up: replace fuel filter, inspect spark plugs 'n' wires, inspect/replace radiator cap and coolant hoses.
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