My dad has a 72 Honda sedan that keeps blowing headlight fuse. Can you please give me ideas on how to tackle this problem for him?
Thanks
Dan
Headlight fuse
Re: Headlight fuse
Dan,
I saw the other post about looking for a break in the wiring which is grounding out..... that will definitely cause the problem. Here is another suggestion: measure the amount of current which is flowing through the fuse (you can lift off one side of fuse and insert an ammeter or if you have an induction ammeter, hold it next to one of the wires going to the fuse terminal for headlights). If the current seems to be ok, take a look at the fuse clip for the headlight position on the fuse block. If it is discolored or is getting hot when the headlights are turned on, you have a bad electrical connection where the fuse clip is riveted to the block or where the wiring clips into the block for the headlights.
Hope you are able to locate the problem without too much effort.
Dale
I saw the other post about looking for a break in the wiring which is grounding out..... that will definitely cause the problem. Here is another suggestion: measure the amount of current which is flowing through the fuse (you can lift off one side of fuse and insert an ammeter or if you have an induction ammeter, hold it next to one of the wires going to the fuse terminal for headlights). If the current seems to be ok, take a look at the fuse clip for the headlight position on the fuse block. If it is discolored or is getting hot when the headlights are turned on, you have a bad electrical connection where the fuse clip is riveted to the block or where the wiring clips into the block for the headlights.
Hope you are able to locate the problem without too much effort.
Dale
Obama Urges Homeowners to Refi! $133K Mortgage for $679/Mo CALCULATE NEW PAYMENT> My dad
> has a 72 Honda sedan that keeps blowing headlight fuse. Can you please give me > ideas on how to tackle this problem for him?
> Thanks
> Dan
Re: Headlight fuse
Dan;
Both of them are correct, and I agree with both of their statements. But, since there is a wire harness for the head light system and it is fairly will protected. I would first, ask your self what you did just before this problem started happening. If nothing, then unplug one head light and see if the fuse blows, then try the same with the other. Working back to where it connects to the harness under the dash.... see where I am leading you here. You will get yourself confused if you do this or that without starting at one end and moving toward the fuse box or head light switch. It could even be one of your head lights. Fuses are put there to be the weak link, allowing the wires to have some protection. Although corrosion will cause your lights to not operate, not much else happens. Now, if the lights were dim before, or they got brighter when you increased RPM's then checking all your connections looking for corrosion leading to high resistance in the system, which could cause a fuse to blow. Another way (so you don't blow anymore fuses) Disconnect your battery, use an Ohm meter and look for high resistance is another test. Finally, this is a 30+ year old vehicle and caution should be taken when pulling on wires.
Bill
Both of them are correct, and I agree with both of their statements. But, since there is a wire harness for the head light system and it is fairly will protected. I would first, ask your self what you did just before this problem started happening. If nothing, then unplug one head light and see if the fuse blows, then try the same with the other. Working back to where it connects to the harness under the dash.... see where I am leading you here. You will get yourself confused if you do this or that without starting at one end and moving toward the fuse box or head light switch. It could even be one of your head lights. Fuses are put there to be the weak link, allowing the wires to have some protection. Although corrosion will cause your lights to not operate, not much else happens. Now, if the lights were dim before, or they got brighter when you increased RPM's then checking all your connections looking for corrosion leading to high resistance in the system, which could cause a fuse to blow. Another way (so you don't blow anymore fuses) Disconnect your battery, use an Ohm meter and look for high resistance is another test. Finally, this is a 30+ year old vehicle and caution should be taken when pulling on wires.
Bill
> -----Original Message-----
> From:
> 2cylinderhondas@yahoogroups.com [mailto:2cylinderhondas@yahoogroups.com] > On > Behalf Of > goinhm@...
> Sent:
> Sunday, May 31, 2009 1:01
> AM
> To:
> 2cylinderhondas@yahoogroups.com
> Subject:
> Re:
> [2cylinderhondas] Headlight fuse
> Dan,
> I saw the other post about looking for a break in the
> wiring which is grounding out..... that will definitely cause the > problem. Here is another suggestion: measure the amount of > current which is flowing through the fuse (you can lift off one side of fuse > and insert an ammeter or if you have an induction ammeter, hold it next > to one of the wires going to the fuse terminal for headlights). If > the current seems to be ok, take a look at the fuse clip for the > headlight position on the fuse block. If it is discolored or is getting > hot when the headlights are turned on, you have a bad electrical > connection where the fuse clip is riveted to the block or where the wiring > clips into the block for the headlights.
> Hope you are able to locate the problem without too much effort.
> Dale
> > My
> > dad has a 72 Honda sedan that keeps blowing headlight fuse. Can you please > > give me ideas on how to tackle this problem for him?
> > Thanks
> > Dan
> Obama Urges Homeowners to Refi! $133K Mortgage for $679/Mo > CALCULATE > NEW PAYMENT
-
Dan Conklin
- Posts: 9
- Joined: Sat Mar 31, 2007 3:33 pm
Re: Headlight fuse
Hello all,
The fuse did not seem to blow for any apparent reason until the last time, it blew when I stepped on the brake. I checked the wires at the master cylinder and notice that they were real loose and two were probably disconnected. One of the ones disconnected did not have insulation covering the connector. I used a pair of needlenosed pliers to tighten up the connection and plug them back in. I also noticed that the front wiring harness was just laying at the bottom of the engine compartment so I moved it to where I think it goes. One of those two things fixed the problem because the fuse no longer blows. Let us have a poll. Who thinks it was the connections at the master cylinder, and who thinks it was the wiring harness?
Thank you all for your input
Dan
The fuse did not seem to blow for any apparent reason until the last time, it blew when I stepped on the brake. I checked the wires at the master cylinder and notice that they were real loose and two were probably disconnected. One of the ones disconnected did not have insulation covering the connector. I used a pair of needlenosed pliers to tighten up the connection and plug them back in. I also noticed that the front wiring harness was just laying at the bottom of the engine compartment so I moved it to where I think it goes. One of those two things fixed the problem because the fuse no longer blows. Let us have a poll. Who thinks it was the connections at the master cylinder, and who thinks it was the wiring harness?
Thank you all for your input
Dan