Curious about the way the headlights function

[gavinmosher]

I have a 84 chevy c10, last night my little bro and i swapped the core support over to the 90 suburban core suppt. now when i turn the dims on one bulb lights up in the center, and then when i hit the brights the dim shuts off and the outer turns on....

my main question is, When your bright lights are on are both suppose to be lit? or just the one.

[glock35ipsc]

Originally Posted by gavinmosher

I have a 84 chevy c10, last night my little bro and i swapped the core support over to the 90 suburban core suppt. now when i turn the dims on one bulb lights up in the center, and then when i hit the brights the dim shuts off and the outer turns on....

my main question is, When your bright lights are on are both suppose to be lit? or just the one.

On the Burb/Blazer/Crews of 88-91, only the outers are on in low beam, and only the inners are on in high beam.

[spinem]

miss-read, disregard.

[gavinmosher]

okay so only individuals in each high and low the reason i asked is because my dads 83 all four lights are on in high and only two are on in low

[glock35ipsc]

All 4 would come on through 87 on models that had 4 lights. That changed with the new grill style for 88-91.