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'90 Accord Brake Lamp indicator
1990 Honda Accord 4 door. Canadian edition (DLR.,etc.). Recently the dash
indicator for "Brake Lamp" has been illuminating constantly (was intermittant for a short time). All brake lamps seem to be operating properly, including HighMount, however indicator is lit whenever vehicle is in motion.(i.e. no park brake). Anyone have any suggestions as to the cause/reason? Anyone have a wiring diagram as to how this magic all takes place? Anyone with a suggestion other than remove dash indicator lamp? I know you guys are really sharp on these things and my daughter will really appreciate not having to look at that little red lamp all the time. Thankyou to each and all of you who have taken the time to read this post and give it your consideration. I hope we will come up with a solution before I have to take it to the dealership for a $100+ dollar fix. Looking forward to your reply and thanks again......bob |
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#2
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"BC Bob" > wrote in message news:zkp5d.510452$M95.343710@pd7tw1no... > 1990 Honda Accord 4 door. Canadian edition (DLR.,etc.). Recently the dash > indicator for "Brake Lamp" has been illuminating constantly (was > intermittant for a short time). All brake lamps seem to be operating > properly, including HighMount, however indicator is lit whenever vehicle > is > in motion.(i.e. no park brake). Anyone have any suggestions as to the > cause/reason? Anyone have a wiring diagram as to how this magic all takes > place? Anyone with a suggestion other than remove dash indicator lamp? I > know you guys are really sharp on these things and my daughter will really > appreciate not having to look at that little red lamp all the time. > Thankyou > to each and all of you who have taken the time to read this post and give > it > your consideration. I hope we will come up with a solution before I have > to > take it to the dealership for a $100+ dollar fix. Looking forward to your > reply and thanks again......bob My 91 EX-R does that every once and a while. Yank out the bulbs and then put them back. It just wants some attention from you. |
#3
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Check all the bulbs carefully once again. Some Accords have two side by
side brake light bulbs on each side and it is easy to miss one. The 90 Accord hatchback was this way, not sure about the sedan. The current to each bulb runs through the coil of a small relay. If there is current flowing, the relay closes. If a bulb is broken, no current flows, and the relay does not close. There is one relay for each light bulb, and all the relay contacts are wired in series. Thus, if any bulb is broken, there will be no continuity through the chain of relay contacts. I believe the '90 had the relays mounted in two modules, on for the left and one for the right hand side. The modules were mounted somewhere in the trunk. The two modules look very similar, but may not be interchangeable; In some Accords one side had a diode whereas the other side did not. On other Accords the two modules were identical and interchangeable. One of the two modules (but not both) require a ground connection. If this ground connection is missing / intermittent / high impedance you can get false brake bulb alarms. I found on my hard disk a ZIP file with Accord wiring diagrams that look like they might be from around the '90 generation. If you post a valid e-mail address, I'll send them to you (or set up an FTP where you can download them). BC Bob wrote: > > 1990 Honda Accord 4 door. Canadian edition (DLR.,etc.). Recently the dash > indicator for "Brake Lamp" has been illuminating constantly (was > intermittant for a short time). All brake lamps seem to be operating > properly, including HighMount, however indicator is lit whenever vehicle is > in motion.(i.e. no park brake). Anyone have any suggestions as to the > cause/reason? Anyone have a wiring diagram as to how this magic all takes > place? Anyone with a suggestion other than remove dash indicator lamp? I > know you guys are really sharp on these things and my daughter will really > appreciate not having to look at that little red lamp all the time. Thankyou > to each and all of you who have taken the time to read this post and give it > your consideration. I hope we will come up with a solution before I have to > take it to the dealership for a $100+ dollar fix. Looking forward to your > reply and thanks again......bob |
#4
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Randolph wrote: > > The 90 Accord hatchback was this way Scratch that, '89 was the last year for the hatch. > > I found on my hard disk a ZIP file with Accord wiring diagrams that look > like they might be from around the '90 generation. If you post a valid > e-mail address, I'll send them to you (or set up an FTP where you can > download them). Scratch that too, these diagrams include wiring for the hatchback and thus must be for 89 or earlier. |
#5
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Likely, water in the taillight.
My 85 Accord used to do it after it rained, now it does it all the time. Wait till the gas filler neck rusts where it meets the tank, then you can only run 3/4 of a tank of gas. "BC Bob" > wrote in message news:zkp5d.510452$M95.343710@pd7tw1no... > 1990 Honda Accord 4 door. Canadian edition (DLR.,etc.). Recently the dash > indicator for "Brake Lamp" has been illuminating constantly (was > intermittant for a short time). All brake lamps seem to be operating > properly, including HighMount, however indicator is lit whenever vehicle is > in motion.(i.e. no park brake). Anyone have any suggestions as to the > cause/reason? Anyone have a wiring diagram as to how this magic all takes > place? Anyone with a suggestion other than remove dash indicator lamp? I > know you guys are really sharp on these things and my daughter will really > appreciate not having to look at that little red lamp all the time. Thankyou > to each and all of you who have taken the time to read this post and give it > your consideration. I hope we will come up with a solution before I have to > take it to the dealership for a $100+ dollar fix. Looking forward to your > reply and thanks again......bob > > > |
#6
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Pretty sure that 87 and older accords (2nd and 3rd gen) had recalls on the
fuel filler neck....Preludes too from similar years. "Mista Bone" > wrote in message ... > Likely, water in the taillight. > My 85 Accord used to do it after it rained, now it does it all the time. > Wait till the gas filler neck rusts where it meets the tank, then you can > only run 3/4 of a tank of gas. > > "BC Bob" > wrote in message > news:zkp5d.510452$M95.343710@pd7tw1no... >> 1990 Honda Accord 4 door. Canadian edition (DLR.,etc.). Recently the dash >> indicator for "Brake Lamp" has been illuminating constantly (was >> intermittant for a short time). All brake lamps seem to be operating >> properly, including HighMount, however indicator is lit whenever vehicle > is >> in motion.(i.e. no park brake). Anyone have any suggestions as to the >> cause/reason? Anyone have a wiring diagram as to how this magic all takes >> place? Anyone with a suggestion other than remove dash indicator lamp? I >> know you guys are really sharp on these things and my daughter will >> really >> appreciate not having to look at that little red lamp all the time. > Thankyou >> to each and all of you who have taken the time to read this post and give > it >> your consideration. I hope we will come up with a solution before I have > to >> take it to the dealership for a $100+ dollar fix. Looking forward to your >> reply and thanks again......bob >> >> >> > > |
#7
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I would also guess that it's the actual circuit that detects a blown bulb,
rather than an actual bulb that's blown (anyway, you already checked the bulbs...) In addition to Randolph's comments below, you might specifically check the multi-point connector that plugs into the detector modules. On my 91, some of the contacts had corroded, which caused the problem. The modules are located on the tail light lens assemblies - I can't remember if the modules are visible from inside the trunk if you only remove the access panels (to get at the light bulbs)...if not, you need to remove part of the trunk liner. Once you have access, you'll see the modules. They're secured to the back side of the lens assemblies, their case is either black or light brown plastic (if memory serves correctly). Good luck! -Arthur Randolph wrote: > Check all the bulbs carefully once again. Some Accords have two side by > side brake light bulbs on each side and it is easy to miss one. The 90 > Accord hatchback was this way, not sure about the sedan. > > The current to each bulb runs through the coil of a small relay. If > there is current flowing, the relay closes. If a bulb is broken, no > current flows, and the relay does not close. There is one relay for each > light bulb, and all the relay contacts are wired in series. Thus, if any > bulb is broken, there will be no continuity through the chain of relay > contacts. > > I believe the '90 had the relays mounted in two modules, on for the left > and one for the right hand side. The modules were mounted somewhere in > the trunk. The two modules look very similar, but may not be > interchangeable; In some Accords one side had a diode whereas the other > side did not. On other Accords the two modules were identical and > interchangeable. > > One of the two modules (but not both) require a ground connection. If > this ground connection is missing / intermittent / high impedance you > can get false brake bulb alarms. > > I found on my hard disk a ZIP file with Accord wiring diagrams that look > like they might be from around the '90 generation. If you post a valid > e-mail address, I'll send them to you (or set up an FTP where you can > download them). > > > BC Bob wrote: > >>1990 Honda Accord 4 door. Canadian edition (DLR.,etc.). Recently the dash >>indicator for "Brake Lamp" has been illuminating constantly (was >>intermittant for a short time). All brake lamps seem to be operating >>properly, including HighMount, however indicator is lit whenever vehicle is >>in motion.(i.e. no park brake). Anyone have any suggestions as to the >>cause/reason? Anyone have a wiring diagram as to how this magic all takes >>place? Anyone with a suggestion other than remove dash indicator lamp? I >>know you guys are really sharp on these things and my daughter will really >>appreciate not having to look at that little red lamp all the time. Thankyou >>to each and all of you who have taken the time to read this post and give it >>your consideration. I hope we will come up with a solution before I have to >>take it to the dealership for a $100+ dollar fix. Looking forward to your >>reply and thanks again......bob |
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