Vechile battery ground problems on 2005 acura rsx type s

left front wheel speed sensor is more then likely due, to a malfunction sensor for the abs sensor, badly connected sensor, or wiring, or contacts corroded or damaged, the knock sensor is usualy do to a fault sensor at the crank shaft where the timing belt is due, this is also more then likely to your engine turnover problems and is just coincidence when refueiling

check wires in rear,check for ground,check for shorts

Bad ground.

activate the horn switch with a test light on both terminals of the horn.

IF the test light comes on then the horn is bad
IF the test list does not come on test the electrical connection

use the test light on the positive terminal and a known good ground
IF the light comes on, the ground on the horn was not connected properly
IF the light does not come on, there is an electrical issue with the switch, the wire grounding before the horn, or the fuse

I'd check those issues one at a time. Note the horn wiring diagram. I got the horn diagram because it is simple. The fuse is hot all the time, not only check the fuse, use a test light and check voltage at the horn fuse. The fuse and horn relay should be in power distribution center under the hood. If you pull relay and use jumper wire between terminals 30 and 87, with terminal 30 hot all the time, the horn should sound, If it does, problem is on control side of horn relay, left side, has to have voltage and ground. Top wire is voltage, bottom wire is ground. The wiring in steering column--clockspring--horn switch are all part of ground for the control side of relay. If the steering wheel has an airbag, have to disable and be careful with it when testing horn wiring circuits in the steering column.
Granted, your other problems maybe more involved? Check for applicable trouble codes

The three prong base is just the bulb holder.

Here is an excellent tutorial on how to change the build:
http://forums.clubrsx.com/showthread.php?t=303640&highlight=change+bulb

The same thing happended to my Acura RSX and now they are saying that it is an electrical problem. I put new bulbs and both of them are fused

look at your charging fuse

The fuse can't click it is probably the relay that is clicking. Check fuse #2.37 it is the 12th from the bottom row of the central junction box from right to left if it is ok ground the dark blue wire coming down from the steering column to check the horn pad and ground. If the horn works you have a problem in the clock spring or ground. If it doesn't check for 2 pins at the horn relay in the central juntion box for 12 volts if you have 12 volts at 2 pins with the key on then jump pin 30 of the relay with pin 87 of the relay and see if the horn goes off if it does have someone press the horn pad and see if you get a ground to pin 85 or 86 of the relay if you don't you have a ground problem to the relay if you do the the relay has failed. If you jump the relay at the central jumction box between pins 30 and 87 and the horn doesn't go off then the horn has failed or isn't properly grounded. Then check the horn for power with the horn pad depressed if there is power at the horn connector. Hold a test light on the ground wire for the horn from the ground of the battery and see if your test light shows power if it does then you have a bad ground to your horn if it doesn't then your horn has failes.

Hello ilandskater2,
It sounds like you may have caused a plug for the lights to come undone or you lost the ground to one side of the car. Some newer vehicles use a reverse type ground system with small computer controlled relays in the system. It sounds like you are getting a reverse feed on the power system under the hood. look at all the plugs and check to see if they are completely pluugged in and check the fuse block to see if any are blown causing the feed back. Check all the grounding points under the hood also. Hope this helps. Regards, rcampsr