Bruce: what Roland is saying is correct ? a maladjusted throttle switch can
cause problems.
Here is what I would do, having just gone through this whole thing yesterday on
a buddies BN6: after doing whatever repair is necessary to the harness, (and
double checking the connections at the relay), disconnect either one of the
throttle switch leads at the switch (tape the loose lead just because) and run
the test again. If the solenoid goes in and out with the dash switch on and
the gear lever being moved in and out of the 3 ?4 position, then the relay is
good and the throttle switch is not set right. (incidetally, the car can be
driven this way, the overdrive will simply switch out as soon as the dash
switch is turned off,)
If the solenoid does not activate at all, the relay is bad and the power is
going to the solenoid through the throttle switch.
Setting the throttle switch correctly is pretty tricky on a Healey ? requires a
lot of beer and bad language.
Earl Kagna
Victoria, B.C.
BJ8, BT7 tri-carb
From: Roland Wilhelmy
Sent: Sunday, September 03, 2017 1:40 PM
To: BJ8Healeys ; healeys at autox.team.net
Subject: Re: [Healeys] Overdrive wiring question
True that the throttle switch is a simple set of spst contacts. But it is
really easy to tighten the mechanical arm on that switch in a position so that
pressing the throttle does the opposite of what you want. ?Worth checking that
the switch opens when you want it open and closed when you want it closed.
-Roland
Sent from my BlackBerry 10 smartphone.
From: BJ8Healeys
Sent: Sunday, September 3, 2017 1:25 PM
To: healeys at autox.team.net
Subject: Re: [Healeys] Overdrive wiring question
Bob, the throttle switch is a simple set of contacts closed by a cam. It
doesn't matter which way the two wires are connected to it.
However, it would be a good idea to verify that the wires are connected
properly to the relay, especially since a new wiring harness has just been
installed.
Steve Byers
HBJ8L/36666
BJ8 Registry
AHCA Delegate at Large
Havelock, NC
From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Bob
Spidell
Sent: Sunday, September 03, 2017 1:48 PM
To: healeys at autox.team.net
Subject: Re: [Healeys] Overdrive wiring question
I'm too lazy to drag out the schematic, but Steve's comment begs the
question--to me, at least--is the throttle 'kickdown' switch wired
bass-ackwards?
Also, since most of us are 'of a generation,' tip a bottle of your favorite
brew to Walter Becker today.
Bob
On 9/3/2017 8:35 AM, BJ8Healeys wrote:
If a set of the relay points were somehow in mechanical contact regardless of
the energizing or not of the relay coil, then you would get 12 volts at relay
terminal C2 without the dash switch being on, and the symptoms you describe.
It's not quite clear to me, however, why the throttle switch stops the symptoms
with the throttle switch open.
Remove the white wires from relay terminal C1 and the white/green ones from
terminal C2 and check for continuity between those terminals. If you have
continuity, then the relay is bad.
Steve Byers
HBJ8L/36666
BJ8 Registry
AHCA Delegate at Large
Havelock, NC
From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Bruce
Steele
Sent: Sunday, September 03, 2017 10:39 AM
To: 'Healey List'
Subject: Re: [Healeys] Overdrive wiring question
A couple of other factors:
1. The dash switch is not defective; it tests fine.
2. Removing the ground from the OD relay (terminal W2) had no effect;
i.e., the solenoid still engaged when the lever was moved to the 3rd/4th
position, indicating to me that the relay was not engaged and thus holding the
relay points closed.
Bruce Steele
Brea, CA
1960 BN7
From: Bruce Steele [mailto:healeybruce at roadrunner.com]
Sent: Saturday, September 02, 2017 9:50 PM
To: 'Healey List' mailto:healeys at autox.team.net
Subject: Overdrive wiring question
After installing the new wiring harness, I encountered a puzzling situation.
With the engine off and the ignition on, the OD solenoid would engage when the
shift lever engaged the transmission switch irrespective of the position of the
dash switch. That is, the solenoid would engage whether the dash switch was on
or off. Further, if I depressed the accelerator, thus opening the throttle
position switch, the solenoid would NOT engage under the same conditions.
Hence, it seems that either the OD relay was engaged by the W1 terminal being
energized or somehow the C2 terminal was energized. Unfortunately I caused a
short in the throttle switch damaging my harness before I could trace this.
Any thoughts?
Bruce Steele
Brea, CA
1960 BN7
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