Instrument lights out... fixed
09-23-2018, 04:12 PM
#1
Melting Slicks
Thread Starter
Instrument lights out... fixed
I got into my 67 yesterday morning to go to cars and coffee and noticed my instrument lights were out. Did a search on debugging this and easily found my tail lights were out. Checked the fuse (2nd up) and it was blown. i replaced it with a 20A fuse and everything works.
The blown fuse was a 30A fuse which of course isn’t correct for the 20A slot. Can’t imagine what would cause a 30A fuse to blow.
Is there anything i should check or just drive it drive it and see what happens?
Ed
The blown fuse was a 30A fuse which of course isn’t correct for the 20A slot. Can’t imagine what would cause a 30A fuse to blow.
Is there anything i should check or just drive it drive it and see what happens?
Ed
09-23-2018, 04:23 PM
#2
Team Owner
Member Since: Feb 2003
Location: Sitting in his Nowhere land Hanover Pa
Posts: 48,984
Received 6,928 Likes
on
4,774 Posts
2015 C2 of Year Finalist
if you have factory AC you should have 30 amp fuse
09-23-2018, 04:28 PM
#4
Race Director
I got into my 67 yesterday morning to go to cars and coffee and noticed my instrument lights were out. Did a search on debugging this and easily found my tail lights were out. Checked the fuse (2nd up) and it was blown. i replaced it with a 20A fuse and everything works.
The blown fuse was a 30A fuse which of course isn’t correct for the 20A slot. Can’t imagine what would cause a 30A fuse to blow.
Is there anything i should check or just drive it drive it and see what happens?
Ed
The blown fuse was a 30A fuse which of course isn’t correct for the 20A slot. Can’t imagine what would cause a 30A fuse to blow.
Is there anything i should check or just drive it drive it and see what happens?
Ed
Probably just drive it and see. You might have a wire with a cut that found a way to get to ground. If it blows again, investigation is needed. Without a schematic handy (away from home) I can't tell you what to check, but the Chevrolet Service Manual has one you could look at.
Until then, keep a couple of spare fuses handy in the car.
Larry
09-23-2018, 04:42 PM
#5
Melting Slicks
Thread Starter
Thanks Larry. I’ll drive it and see what happens. Not worried at all. Not sure how long it’s been like this because I haven’t driven it in the dark in quite a while.
Ed
Ed
09-23-2018, 05:08 PM
#6
Team Owner
Member Since: Feb 2003
Location: Sitting in his Nowhere land Hanover Pa
Posts: 48,984
Received 6,928 Likes
on
4,774 Posts
2015 C2 of Year Finalist
read your owners manual or AIM. its in there. the tail light fuse controls your dash lights. GM thought it was a good idea with the extra lights for the AC add on harness to up the amp on the fuse
09-23-2018, 05:37 PM
#7
Melting Slicks
Thread Starter
This is all I could find. Pretty confusing.
If anything, it looks like the second from the top should be 30A as it says heater on left and AC on right.
Last edited by emdoller; 09-23-2018 at 06:08 PM.
10-12-2018, 07:35 PM
#8
Race Director
Ed:
Finally got back home and had a chance to check my 67 car. The Chevrolet Service Manual for 1967 shows a 25 amp fuse for this slot. Checking my car fuse block it also shows 25 amp fuse lettered in white. A 25 amp fuse is what is installed as well.
The under dash fuse block has the fuse size shown in white letters as well as what the circuit is used for. Over time some of this white lettering fades or comes off.........but it was there originally.
Hope this helps.
Larry
Finally got back home and had a chance to check my 67 car. The Chevrolet Service Manual for 1967 shows a 25 amp fuse for this slot. Checking my car fuse block it also shows 25 amp fuse lettered in white. A 25 amp fuse is what is installed as well.
The under dash fuse block has the fuse size shown in white letters as well as what the circuit is used for. Over time some of this white lettering fades or comes off.........but it was there originally.
Hope this helps.
Larry
10-12-2018, 07:42 PM
#9
Drifting
10-12-2018, 10:10 PM
#10
Melting Slicks
Thread Starter
Ed:
Finally got back home and had a chance to check my 67 car. The Chevrolet Service Manual for 1967 shows a 25 amp fuse for this slot. Checking my car fuse block it also shows 25 amp fuse lettered in white. A 25 amp fuse is what is installed as well.
The under dash fuse block has the fuse size shown in white letters as well as what the circuit is used for. Over time some of this white lettering fades or comes off.........but it was there originally.
Hope this helps.
Larry
Finally got back home and had a chance to check my 67 car. The Chevrolet Service Manual for 1967 shows a 25 amp fuse for this slot. Checking my car fuse block it also shows 25 amp fuse lettered in white. A 25 amp fuse is what is installed as well.
The under dash fuse block has the fuse size shown in white letters as well as what the circuit is used for. Over time some of this white lettering fades or comes off.........but it was there originally.
Hope this helps.
Larry
Ed
10-13-2018, 12:02 PM
#11
Race Director
Apparently I provided a correct answer to the wrong question. I should have read (reread) the entire thread. Ed was initially talking about the taillight fuse for this car. Somehow I thought he was asking about the blower fuse for AC and non-AC cars. I was in Illinois in September visiting family when I first read the question. Somehow over the next month I transposed the question to be something else. 
My answer was correct for the fuse-block fuse for a factory AC car. In addition, a 30 amp in-line fuse is also installed on a separate red wire for the blower HI speed relay.
For taillights: AC or non-AC doesn't matter. 20 amp fuse in the fuse-block is the correct one for all. If something else was installed it was probably all that was available at the time. A quick check for "brighter taillight and stoplight bulbs" shows that some folks have installed #2357 bulbs in place of the original factory #1157 bulbs over the years to provide for brighter lights. These bulbs will use more current, so perhaps that may also explain the higher amp fuse that was installed.
I think this answers OP's original question + a bit of lagniappe Advancing age may also play a part.
Larry
My answer was correct for the fuse-block fuse for a factory AC car. In addition, a 30 amp in-line fuse is also installed on a separate red wire for the blower HI speed relay.
For taillights: AC or non-AC doesn't matter. 20 amp fuse in the fuse-block is the correct one for all. If something else was installed it was probably all that was available at the time. A quick check for "brighter taillight and stoplight bulbs" shows that some folks have installed #2357 bulbs in place of the original factory #1157 bulbs over the years to provide for brighter lights. These bulbs will use more current, so perhaps that may also explain the higher amp fuse that was installed.
I think this answers OP's original question + a bit of lagniappe Advancing age may also play a part.
Larry
Last edited by Powershift; 10-13-2018 at 12:02 PM.