Daft question on fuse location

strangerover · Postby **strangerover** » 13 Apr 2008 08:24

Is it just me, or have Haynes left the fuse layout out of their workshop manual? Suddenly I have no door lights, windscreen washer motor or horn! I think everything else is fine. The fuse layout guide on the cover in the glovebox does not mention these electrical items, does anybody know where the fuse(s) for these items are located?
Having just passed its MoT first time I was quite pleased... until these electrical problems arrived!
Mine is a Y reg 1982/3 (V8 retro converted) convertible with the ignition key on the left hand side of the steering column. Thanks in advance!

Trevor

samco · Postby **samco** » 13 Apr 2008 08:56

I'm sorry strangerover this is not an answer to your question but does anyone know what the seperate in line fuse does by the fuse box? It has brown wires to it, but whilst re fitting my dash I could not decide what it did or where it should be accessible from

If it doesn't fit you obviously need a bigger hammer.

www.metronewquay.co.uk www.wheelintheheel.co.uk

Check out my album

http://s163.photobucket.com/albums/t299/samco_bucket/

My youtube progress http://www.youtube.com/watch?v=4kMDqLU1N7Y

1980 Californian import converted to right hand drive V8. Under construction.

TR Tony · Postby **TR Tony** » 13 Apr 2008 09:01

All the fuses are in the back of the glovebox, Trevor, there are none in different parts of the vehicle (unless the wiring has been modded in the past).

Sorry but don't know off hand which fuse is which. On the later cars one of the relays on the left hand side of the fuse box is for the horn - check the connections there. I have heard of problems from simple bad connections in the fuse box, so may be worth just checking all the connections, or replacing fuses one by one?

Tony

1981 2L FHC Cavalry Blue - very original & not rusty!
1980 3.5L V8 DHC Regency Red - on the road again.

Odd · Postby **Odd** » 13 Apr 2008 09:47

In my '80 TR8 efi the circuits were fused like this showed below, and my guess is
it's BOTH the battery auxiliary AND ignition auxiliary fuses you've blown
(provided your circuits are routed/fused as in the '8):
----------------------------------------------------------------
Fuse No. - Protected Circuits ------------ Current Capacity
1 - 2 ---- A/C Fan Relay 2 [Left fan] ---- 35A
3 - 4 ---- Seat heaters ----------------------- 15A
5 - 6 ---- Battery Auxiliary: Horn Relay, - 50A
------------ Hazard warning, Cigar lighter,
------------ Courtesy lights, Motor antenna
7 - 8 ---- R/H Front parking light, R/H -- 15A
------------ Side markers, R/H Rear light,
------------ Number-plate lights, Instrument
------------ illumination
9 - 10 --- L/H Front parking lights, L/H - 15A
------------ Side markers, L/H Rear light
11 - 12 -- A/C Fan Relay 1 [Right fan] -- 35A
13 - 14 -- L/H Dipped headlight ---------- 25A
15 - 16 -- Ignition Auxiliary: L/H + R/H -- 35A
------------ direction indicators, Front fog
------------ lights, Stop lights, Reverse lights,
------------ Low coolant indicator, Low fuel
------------ indicator, Windscreen washer,
------------ Windscreen wiper motor
17 - 18 -- L/H Main headlight -------------- 25A
19 - 20 -- Heater blower, A/C Compressor -- 35A
---------- clutch Relay
21 - 22 -- R/H Main headlight --------------- 25A
23 - 24 -- R/H Dipped headlight, Rear -- 25A
------------ Fog light

Oh, why oh why can't this damned system allow for TAB alignments!!!? Grrrr...

Beans · Postby **Beans** » 13 Apr 2008 10:53

And this is how it looks in a diagram (which is stuck to the inside of the fuse box lid). Diagram is from a TR7 PI (late US spec) in your case the fuses for the AC gear will be blank ...

If the fuse is gone, first check your cigarette lighter to start with ...

<center>

1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC
http://tr7beans.blogspot.com/</center>

busheytrader · Postby **busheytrader** » 13 Apr 2008 11:32

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by samco

I'm sorry strangerover this is not an answer to your question but does anyone know what the seperate in line fuse does by the fuse box? It has brown wires to it, but whilst re fitting my dash I could not decide what it did or where it should be accessible from

<hr height="1" noshade id="quote"></blockquote id="quote">

Samco,

Is this a small brown / black item that falls off easily? I dislodged this from my 1980 DHC when I replaced my carpets and it fell on the floor. Daft thing just hanging around near the fuse box. Typical Triumph. It stopped my headlight pods from working. I think it determines how long the pods stay up when the headlights are flashed.

Part no. 151244 I think from the Rimmers catalogue (Circuit breaker headlamp lift)

http://www.rimmerbros.co.uk/tr7/images/78c.gif

Cheers,

Adam

TR7 V8 DHC Jaguar Solent Blue. 9.35cr Range Rover V8, Holley 390cfm, JWR Dual Port, 214 Cam, Lumention, Tubular Manifolds, Single Pipe Exh, 3.08 Rear, 200lb Spax & Solid Bushes, Anti- Dive, Granada Vented Discs & Calipers, 4 Speed Rear Cylinders, Uprated Master Cylinder & Servo, AllyCat 5 Spokes. No Door Stickers.

strangerover · Postby **strangerover** » 13 Apr 2008 12:28

Hey guys, thanks for the input, and on a Sunday too! Just went out for a spin in the Suffolk countryside in the sun with the roof down to buy some eBay stock - the guy selling ran an MGBV8 track race car and he took the TR7 V8 for a spin and loved it!
Anyhow, on return checked fuse 5-6 as suggested, and yes, although it looked OK, when prising it out (not easy!), it had indeed blowm. It also runs the clock, so that works with everything else mentioned too now.
A big thanks![:D]
Trevor

TR Tony · Postby **TR Tony** » 13 Apr 2008 13:53

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by busheytrader

[quote]Originally posted by samco

I'm sorry strangerover this is not an answer to your question but does anyone know what the seperate in line fuse does by the fuse box? It has brown wires to it, but whilst re fitting my dash I could not decide what it did or where it should be accessible from

<hr height="1" noshade id="quote"></blockquote id="quote">

Samco,

Is this a small brown / black item that falls off easily? I dislodged this from my 1980 DHC when I replaced my carpets and it fell on the floor. Daft thing just hanging around near the fuse box. Typical Triumph. It stopped my headlight pods from working. I think it determines how long the pods stay up when the headlights are flashed.

Part no. 151244 I think from the Rimmers catalogue (Circuit breaker headlamp lift)

http://www.rimmerbros.co.uk/tr7/images/78c.gif

Cheers,

Adam<hr height="1" noshade id="quote"></blockquote id="quote">

Almost right I think Adam, but it's not to control the headlamp flash delay - that is the Pektron unit which is one of the larger items attached to the fuseboard. This little part that Samco refers to is I believe the self resetting Otter switch (thermal cut out) to protect the headlamp circuit in the case of overload.

Bet you never knew you had an Otter living in the glovebox ........[:D]

Tony

1981 2L FHC Cavalry Blue - very original & not rusty!
1980 3.5L V8 DHC Regency Red - on the road again.

saabfast · Postby **saabfast** » 13 Apr 2008 15:53

Trevor, assuming your car is UK sourced the fuses maight be a little different to Beans listing. Mine, for an '81 DHC (2.0) are:

Top row, L to R
11-12 Air con fan No 1 20A (not fitted in mine)
9-10 RH side lights 15A
7-8 LH Side lights 15A
5-6 Battery, Aux & Horns 35A (also cig lighter, Hazard lights, Courtesy light, fog lights, electric aerial)
3-4 Heated Rear Screen 15A
1-2 Air con fan No 2 (not fitted in mine)

Bottom row, L to R
23-24 Dip beam LH 25A
21-22 Main Beam LH 25A
19-20 Heater blower 35A
17-18 Main Beam RH 25A
15-16 Ignition Aux 25A (does wiper motor, reverse lights)
13-14 Dip Beam RH 25A

Hope this helps.

Alan
Saab 9000 Stg 1
'81 TR7 DHC

saabfast · Postby **saabfast** » 13 Apr 2008 15:58

In fact, looking at it again, not that different to Beans except the layout is upside down and back to front(this is as printed on the hatch and in the handbook). Did they really flip the fuse arrangement between LHD and RHD ?

Alan
Saab 9000 Stg 1
'81 TR7 DHC

Rich in Vancouver · Postby **Rich in Vancouver** » 13 Apr 2008 16:32

Nothing would surprise me with Triumph wiring. I have an early Speke car with the 4 position fusebox. The manual, rather than saying the top fuse protects the lights or such, identifies the fuse functions by wire colour, forgetting that the wires are not visible with the fusebox mounted. I just keep an electrical test light in the car.

Rich

1975 TR7 ACL764U

jclay (RIP 2018) · Postby **jclay (RIP 2018)** » 13 Apr 2008 19:14

It's 15/16.

mariusl · Postby **mariusl** » 14 Apr 2008 07:14

The fuse layout is printed on the back of the fuse box cover
Just make sure you have it right way round when reading

Mariusl

jclay (RIP 2018) · Postby **jclay (RIP 2018)** » 14 Apr 2008 12:11

One thing to check on fuses. When you have them out, give the caps a light twist. I found that the main 50 amp fuse in my car had never been soldered correctly on one end. After re-soldering it, may of my electrical problems went away.

strangerover · Postby **strangerover** » 14 Apr 2008 17:15

Yes jclay, that happened on my Discovery, the fuel pump fuse was an ultra cheap one - it looked OK, but constantly gave an intermittant running fault as it was cracked at one end. Changed the fuse and no problem.
The fuse diagram is indeed 180 degress out on my UK car compared to Beans picture displayed above.
Trevor

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Daft question on fuse location

Daft question on fuse location

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