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'88 Convertible - starter not getting power

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Old Nov 1, 2017 | 05:21 PM
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'88 Convertible - starter not getting power

Turn the key, a relay clicks in the instrument cluster, but nothing from under the car. Roll starting starts fine, thank goodness there's a hill both at home and at work.

First time this happened, disconnecting/reconnecting the battery restored normal starting. a few days later, problem repeats, and no joy with the easy "fix." I'm thinking that the anti-theft relay is stuck. High humidity issues inside the car due to a leaky top has played havoc with various electronics over the past couple of years, they usually go away when I get things dried out. I'll rebuild/replace or bypass this darn relay if someone could just tell me where to find it.

Suggestions for other potential causes, and their fixes would be gratefully appreciated.

Last edited by architect; Nov 1, 2017 at 05:23 PM.
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Old Nov 1, 2017 | 07:46 PM
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Originally Posted by architect
Turn the key, a relay clicks in the instrument cluster, but nothing from under the car. Roll starting starts fine, thank goodness there's a hill both at home and at work.

First time this happened, disconnecting/reconnecting the battery restored normal starting. a few days later, problem repeats, and no joy with the easy "fix." I'm thinking that the anti-theft relay is stuck. High humidity issues inside the car due to a leaky top has played havoc with various electronics over the past couple of years, they usually go away when I get things dried out. I'll rebuild/replace or bypass this darn relay if someone could just tell me where to find it.

Suggestions for other potential causes, and their fixes would be gratefully appreciated.

For the life of me i cant remember the location of it. I had the same problem with my first Vert and this was the exact reason why i had to get it towed 150kms



Edit: Ah Ha if i remember correctly to disable the alarm you need the unplug the Gold colored box behind/under glove box on S4s and unplug the wide white plug on the cpu on S5s behind the kick panel on the drivers side

Last edited by PnoyRx7; Nov 1, 2017 at 07:49 PM.
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Old Nov 4, 2017 | 10:50 PM
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Originally Posted by architect
Turn the key, a relay clicks in the instrument cluster, but nothing from under the car. Roll starting starts fine, thank goodness there's a hill both at home and at work.

First time this happened, disconnecting/reconnecting the battery restored normal starting. a few days later, problem repeats, and no joy with the easy "fix." I'm thinking that the anti-theft relay is stuck. High humidity issues inside the car due to a leaky top has played havoc with various electronics over the past couple of years, they usually go away when I get things dried out. I'll rebuild/replace or bypass this darn relay if someone could just tell me where to find it.

Suggestions for other potential causes, and their fixes would be gratefully appreciated.
Architect,

Do you have a copy of the wiring schematic for your model year FC? The following is based upon my 91 FC schematics, A-2 and T-2 (Pg Z-26, Z-27, and Pg Z-142, Z-143). I would recommend checking the following components based upon your symptoms:

1. Starter Cut Relay, located along the driver side firewall at Connector A-02.
2. Body CPU, located along driver side kick panel next to the fuse box (S5 only, I believe), at Connector T-01.
3. Starter (Clutch) interlock switch at Connector A-07.
4. Inspect Ground and Positive cables for kinks, breaks, cuts, or corrosion from the battery to the starter and chassis ground.

Again, this information was taken from a 1991 RX-7 wiring diagram manual. Your results may differ for the 1988 model year. BTW, does the car's SECURITY light act unusual? Does it have a weird flashing pattern or none at all? That is a dead give-away for a bad Body CPU in an S5.

Best of luck on your repairs! Please keep us posted on your progress.

Cheers,
George

Last edited by Gen2n3; Nov 5, 2017 at 03:01 PM. Reason: Grammar correction.
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Old Nov 4, 2017 | 11:06 PM
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From: retired rotorist
i have relays that usually cure this, the problem is resistance accumulating in the starter cut circuits due to age. pm me if you want more info.
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