focus218 Posted July 5 Report Posted July 5 Any solid advice before I start tearing up my dashboerd? Thank you. https://imgur.com/a/hkMFY2a Quote
Banjo Posted July 5 Report Posted July 5 (edited) That is a strange one. Have you upgraded your headlights or the bulbs recently ! There is no headlight relay in the early Corollas. The headlight current passes through the contacts in the headlight switch on the column. I can only suggest that when the headlights are switched on, the +12V to the dash assembly drops off somewhat. The fuel guage is fed by a regulated voltage less than 12V, so that the guage always reads correctly. Are the headlights a bit dull also. I would measure the +12V at the steering column, with the headlights on & off, & see what the difference is. The regulator for the fuel guage can use a 7, 8, or even 10 volt regulator If the head lights are dropping the +12V supply to the dash, to less than 10 volts, that may be what is causing it.. My suggestion; is to have the headlight switch control an automotive relay only. Use the relay's contact to switch the +12V directly from the battery, via a 15A automotive fuse; to the headlights. P.S. Have a read of recent thread, which may help you shed some light on the issue. https://www.rollaclub.com/board/topic/85671-ke55-cluster-not-working-properly/#comment-738595 Cheers Banjo Edited July 5 by Banjo 1 Quote
altezzaclub Posted July 5 Report Posted July 5 Fit this if you haven't already- https://www.ebay.com.au/itm/177487513731?fits=Plat_Gen%3AKE55|Make%3AToyota&_skw=toyota+ke55+headlight+relays&itmmeta=01KWTATQAZEH18AW53VFYHEBS4&hash=item2953148883:g:wf4AAeSwLYlo7Qds&itmprp=enc%3AAQALAAABAGfYFPkwiKCW4ZNSs2u11xCm4UXQkL%2BH54Zn1Fi%2FK%2FCIxUre4eicbqIcF95OZ3t96q3XP9vLhknAsfBIOe48eDFmvIJRe3bpPw%2Fz1sSKPYDumWI8AZ5SB53LcKn3Yf0j12SROuHpLD%2FLX7ytBHgGOdGenbEhBoRSsLMw7UVJsyBhS7UKjgWoslCbmI95WhAvYTFyqP87W3JUdVfdD0vHf%2BQXMAeOpUMjDi6uPdRqoBDAow93TxGrZzWFtnfwEe15Nwcz1Mlse0h8qu154ciC%2F1NqyBVjz7DXeQJFCZl7%2BG4RjBRdClkDRxIt5oGKoj25zwzDMBYnGV5WSEdLWk1aIqQ%3D|tkp%3ABk9SR-b16srmZw It takes all the heavy current out of the dash system. Its well worth the $30, but you can make your own with a couple of relays, which I did in The Girls KE70 many years ago. Then I'm afraid it will be tearing the dash out and cleaning earths and contacts and checking voltages... Quote
Banjo Posted July 6 Report Posted July 6 (edited) Hi Michalis, The relay conversion, for switching the headlights on & off, will be one of the simplest, easiest modifications, You can do, for your Corolla ! Cheers Banjo Edited July 6 by Banjo Quote
focus218 Posted July 7 Author Report Posted July 7 Thank you both. I just ordered it and will try fitting it as soon as it arrives. Quote
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