Re: 96 cavalier pass headlight out 10.4 volts to socket...
Are you trying a 9004 or 9007 bulb? very similar but actually differnt. Check and make sure you have a ground present at connector, these cars very bad for broken wires in harness under battery tray by washer fluid bottle
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The light socket itself could be bad. If you turn on the lights and put a meter on it you can verify there is power at the socket. If not you still have to trouble shoot some more. No power at socket could be wiring that went bad or melted but you will have to remove the socket and test the wires themselves. No power at the wire bare ends you have to go back to the fuse distribution and check that. Low voltage sucks for this very reason. good luck.
12V power passes through 15A fuse 33 (the one that keeps blowing?) in the battery junction box and on to the main light switch. When the main light switch is set to PARK, 12 volts is routed via the BRN lead to the park filaments of the dual park/turn lamps. These lights remain on when the headlight switch is turned to HEAD.
The main light switch gets its 12V input from 7.5A fuse 11 in the central junction box and the same 15A fuse (33) identified above. When the main light switch is set to PARK, 12 volts is routed via the BRN lead to the instrument panel dimming module and module output is applied to the panel illuminating lamps.These lights remain on when the headlight switch is turned to HEAD.
The input to fuse 33 is hot all the time so should read 12V. If you read 12V at the TAN/WHT connection with the fuse out, something is definitely not right. I'm sure you have noted that the fuse is common to the non-functioning circuits you mentioned.
When replacing headlight bulbs it's best to wear gloves as the oil from your skin can actually damage the new bulb. Spray out the headlight socket with some electrical cleaner and make sure the bulb is properly seated with no bent wires on the the bulb where it inserts into the socket.
take a volt meter to the sockets and see if you get any voltage. if you don't, try a continuity test on the socket and see if there are any shorts, blown fuses are good indications of shorts. if you have no voltage and no shorts, you have cut wires somewhere along the lines. i'd say check your relays but if your not getting any voltage at all, it probably won't be relays. check it anyway
hope it helps
try checking the ground wire on the frame next to the head light if you have a volt meter measure voltage on the hot side, if there is 12 volts then measure it on the ground side, is it lower than 12 volts? if it is you have bad ground strap follow the wire it will be near the radiator core support and sand it off if that does not help then it's in the light switch.
well cking fuses are for both headlights neither would work. while these bulbs produce heat, make sure not to touch glass, or get any debris, on the capsule prior to install. is so clean with rubbung alcohol ck socket for corrosion, make sure you are getting voltage to socket. if all is good you will have headlites
your in for a real treat.... i had a similar problem with mine, the
stock gm wiring is terrible, your best bet pull the wiring apart in the
front of the car and inspect each wire splice they tend to corrode and
once it gets to a certain point it wont allow any electricity to pass,
i ended up rewiring the entire headlight system myself. you can get the wiring diagram from the haynes manual. good luck