 Hazard relay clicking all the time. |
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| steuspeed |
 Sep 24 2020, 09:36 PM
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#1
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Senior Member  Group: Members Posts: 1,005 Joined: 12-July 11 From: Portland, Oregon Member No.: 13,308 Region Association: Pacific Northwest  |
This is a weird one. The Hazard relay on my new project car clicks all the time. When you pull the flasher switch it clicks louder and the flashers work as they should. Where should I start? (IMG:style_emoticons/default/smash.gif)
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| framos914 |
Sep 24 2020, 10:55 PM
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#2
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Member Group: Members Posts: 125 Joined: 15-May 14 From: Corona California Member No.: 17,353 Region Association: Southern California 
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What year? With a good wiring diagram, check why the coil on flasher relay is always getting power and activating. Work your way back to the source. The diagram will tell what to expect on each pin of relay.
If the coil is stuck closed the lights will operate normal when you pull the switch. |
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| steuspeed |
Sep 24 2020, 11:54 PM
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#3
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Senior Member Group: Members Posts: 1,005 Joined: 12-July 11 From: Portland, Oregon Member No.: 13,308 Region Association: Pacific Northwest |
QUOTE(framos914 @ Sep 24 2020, 09:55 PM)  What year? With a good wiring diagram, check why the coil on flasher relay is always getting power and activating. Work your way back to the source. The diagram will tell what to expect on each pin of relay. If the coil is stuck closed the lights will operate normal when you pull the switch. It's a 74 2.0L. I have one of those enlarged color wire diagrams. My eyes can't read those crapy Haynes diagrams. |
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| Spoke |
Sep 25 2020, 06:11 AM
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#4
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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Attached is the simplified schematic/wire diagram for '74-'76 914 with some electrical leakage path to ground. The OEM 914 flasher relay is designed to flash normally with very little current draw. This is so the MC brake warning and ebrake warning lights can be flashed normally.
If there is some electrical leakage path to ground the flasher will click. The problem is finding the leak. Maybe try pulling out the MC and ebrake warning lights and make sure they are not causing the mystery clicking. Besides the brake warning lights, the only items on pin 49a of the flasher relay are the hazard switch and turnsignal stalk and its wiring. If removing the brake warning doesn't stop the clicking, try disconnecting the hazard switch and or the turnsignal stalk. Attached thumbnail(s) 
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| framos914 |
Sep 25 2020, 07:59 AM
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#5
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Member Group: Members Posts: 125 Joined: 15-May 14 From: Corona California Member No.: 17,353 Region Association: Southern California
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That's a nice diagram easy to understand
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| dr914@autoatlanta.com |
Sep 25 2020, 08:11 AM
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#6
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914 Guru Group: Members Posts: 7,822 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
reset switch on the master cylinder read all about it in the 914 "Tech Tips 700"
QUOTE(steuspeed @ Sep 24 2020, 08:36 PM) This is a weird one. The Hazard relay on my new project car clicks all the time. When you pull the flasher switch it clicks louder and the flashers work as they should. Where should I start? (IMG:style_emoticons/default/smash.gif) |
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| steuspeed |
Sep 25 2020, 11:20 AM
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#7
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Senior Member Group: Members Posts: 1,005 Joined: 12-July 11 From: Portland, Oregon Member No.: 13,308 Region Association: Pacific Northwest |
QUOTE(dr914@autoatlanta.com @ Sep 25 2020, 07:11 AM) reset switch on the master cylinder read all about it in the 914 "Tech Tips 700" QUOTE(steuspeed @ Sep 24 2020, 08:36 PM) This is a weird one. The Hazard relay on my new project car clicks all the time. When you pull the flasher switch it clicks louder and the flashers work as they should. Where should I start? (IMG:style_emoticons/default/smash.gif) Previos owner did a bunch of work on the brakes. Bet that's it! |
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