No power to engine bay loom.

Hi,
anyone know why there would be no power to my engine loom. The cold start, warm up reg, oil, temp sensor, iacv etc has no power running to them. My engine starts but runs like a dog and back fires.

Cheers

have you checked the fuse box to see if anything has falling off there, also what have you tryed or lookd save it being resurjested to you

It's all plugged in. There's no power to any of the wires that are plugged into the fuse box :s

The fuel injection is mechanical, even without the CSV, AAV or WUR being electrically powered, the car will eventually start and the latter 2 will heat up due to conductivity. So it running like a dog is, basically, unrelated.

WIthout looking at the wiring diagram (do you have one? Its easier just to look at it and follow the wires) it might be the ignition switch, if not then its a break in the wire, a poor connection or an internal break in the fusebox, or a fuse somewhere.

Should there be 12v to all of the thick round pins on the back of the fuse box?

Should there be 12v to all of the thick round pins on the back of the fuse box?

I pulled this from the 'sticky' at the top for you, it may help!?


Wiring connections on fuze board rear

 

A Blue 28 pin Instrument cluster wiring harness
B Red 28 pin Instrument cluster wiring harness (position 5 open)
C Yellow 22 pin Engine compartment/engine management, left side (position 10 open)
D White 29 pin Engine compartment/wiper motor wiring harness, right side (position 6. 10, 14, 18, 27, 28 open)
E Black 18 pin Rear wiring harness (position 17 open)
G n/a 1 pin 10 individual circuits
H Brown 6 pin Air conditioning/coolant fan relay wiring harness
K Neutral 5 pin Seat belt warning system/coolant level wiring harness
L Grey 4 pin Horn wiring harness
L Black 4 pin Headlight/dimmer switch wiring harness
M Black 2 pin Steering column switch wiring harness
M Black 2 pin Headlight/dimmer switch wiring harness
N Red 1 pin Separately fused circuits (glow plug wiring harness)
P Red 7 pin 7 single point connectors for terminal 30 circuit
R Green 2 pin Open/ECM power supply relay

A
1 - gry/blu- light switch pin 58b (dash light dimmer)
2 - grn - wiper stalk pin 53
3 - blu/yel- dash plug pin T7b/7 (upshift control light)
4 - blu/blk- dash plug pin T7c/4 (oil pressure control unit, 0.3 bar feed)
5 - grn/yel- wiper stalk pin 53b
6 - grn/blk- wiper stalk pin 53e
7 - blk/grn- hazard switch pin R & indicator switch pin R
8 - blk - ignition switch pin 15
9 - wht/blk- light switch pin 56
10- blk/grn/wht- hazard switch pin 49a & indicator switch pin 49a
11- blue/brn- spare plug behind fusebox? (indicator relay pin 2)
12- brn/blk- wiper stalk pin J
13- blk/blu- hazard switch pin 15
14- grn/wht- wiper stalk pin L
15- grn - fusebox pin B/1
16- blu - dash plug pin T7a/5 (alternator warning light)
17- blu/red- dash plug pin T7/7 (indicator warning light)
18- wht - hazard switch pin 49
19- grn/red- wiper stalk pin T
20- blk/wht- hazard switch pin L & indicator switch pin L
21- yel - indicator stalk pin 56b (headlight flasher/main beam switch)
22- blk/yel- rear window heater switch pin + and heated seat switches pin 15
23- blk/red- glovebox light and fresh air blower switch pin + or A/C switch pin +
24- gry/grn- light switch pin 58 (dash light dimmer)
25- blk/yel- fusebox pin L/1
28- blu/wht- dash plug pin T7/? (high beam warning light)

B
1 - grn - fusebox pin A/15 and dual circuit & handbrake warning light
2 - grn/wht- fog light switch pin 83b (fuse #17)
3 - vio/blk- dash plug pin T7b/6 (fuel gauge)
7 - yel/red- dash plug pin T7a/5 (coolant temp gauge)
8 - red/blk- ignition switch pin 50
9 - blk/gry- wiper stalk pin 53a
10- blk/yel- light switch pin X
11- gry/red- cig lighter
\- red - radio power plug pin 7
12- red - digital clock/MFA
13- red/yel- indicator stalk pin 30 (headlight flasher/main beam switch)
15- yel - dash plug pin T7a/4 (oil pressure control unit, 1.8 bar feed)
16- wht/yel- fog light switch pin 83a
18- blk/grn- upshift/fuel consumpton indicator solonoid shut-off
19- red/blk- dash plug pin T7b/4 (rev counter)
20- grn/yel- fog light switch pin 83
21- wht/grn- rear window heater switch pin 86
22- wht - indicator stalk pin 56a (headlight flasher/main beam switch)
23- red - light switch pin 30
25- brn/blk- fusebox pin L/2
26- gry/red- light switch pin 58R
27- gry/blk- light switch pin 58L
28- red/wht- hazard switch pin 30

C
1 - red/blk- brake light switch
2 - blu - alternator pin D+
3 - red/yel- brake light switch
4 - grn/blk- left parking light bulb
5 - yel/wht- left headlight bulb pin 58b
6 - yel - right headlight bulb pin 58b
7 - red - radiator fan thermal switch & radiator fan after-run relay pin 30
8 - blk/grn- right front indicator & repeater
9 - grn/red- windscreen washer pump pin +
12- blu/brn- brake fluid level warning switch
13- blk/yel- dual tone horns
14- grn/red- right parking light bulb
15- brn/blk- dual tone horns
16- wht - right headlight bulb pin 58a
17- wht/blk- left headlight bulb pin 58a
18- red/blk- thermo switch for cold start valve (K-Jet f/inj) or digifant ECU pin 1
19- blk/wht- left front indicator & repeater
20- blk - radiator fan run-on control unit pin 2/15
\- blk - reverse light switch (MK1 models)
21 - blk/blu - reverse light switch (MK1 models)
22- wht/yel- foglights

D
1 - blu/blk- oil pressure switch (0.3 bar)
2 - blk - thermal switch for inlet manifold heater (carb models) or fusebox pin R/1 (digifant f/inj) or idle & WOT switches
\- blk/wht- idle overrun cut-off valve (carb models)
\- blk - knock sensor control unit pin 5
3 - wht/grn- fuel gauge sender or transmission switch/upshift indicator
7 - blk/yel- low coolant level switch unit pin 6/15, idle boost control unit pin 2/15 (K-Jet f/inj)
8 - wht/red- vacuum switch/upshift indicator
9 - grn/yel- windscreen wiper motor pin 53b
12- grn - windscreen wiper motor pin 53
13- vio/blk- thermal switch for carb heater, inlet manifold heater, auto choke & bypass cut-off valve (carb models)
\- red/yel- electronic ignition control unit pin 10 (16v) or digifant ECU pin 3 (digifant f/inj)
\- red/yel- knock sensor control unit pin 10 (16v)
15- wht/vio- resistance wire -> ignition coil pin 15
16- blk/red- reverse light switch (M/T) or starter/inhibitor & reverse light switch pin 15 (A/T) (MK2 models)
17- grn/blk- windscreen wiper motor pin 53e
19- blu/blk- reverse light switch or starter/inhibitor & reverse light switch pin R & diode (A/T) (MK2 models)
20- blk/gry- windscreen wiper motor pin 53a
21- yel - oil pressure switch (1.8 bar)
22- br - windscreen wiper motor pin 31, and spare connector behind fusebox or to earth 'claw' near fusebox
23- blk - ignition coil pin 15
24- red/blk- starter pin 50 (M/T) or starter/inhibitor & reverse light switch pin 50 (A/T)
26- red/blk- ignition coil pin 1 & idle control unit pin 1 (K-Jet f/inj), overrun cut-off valve (K-Jet f/inj)
29- yel/red- coolant temp sender
\- yel/blk- low coolant level switch unit pin B/G

E
1 - gry/grn- number plate lights
2 - grn/blk- rear wiper motor pin 53
3 - red - interior light & boot light
5 - vio/blk- fuel pump or fuel gauge sender pin G
6 - blk/wht- left rear indicator
7 - grn/red- windscreen washer pump pin 31 (rear pump on earlier models)
\- brn/blu- windscreen washer pump
8 - blk/gry- rear wiper motor pin 53a
9 - grn/blk- left rear light
10- grn/wht- rear foglight
11- blk/grn- rear right indicator
12- blk - reverse lights pin RF
13- grn - handbrake warning switch
14- red/wht- warm up regulator, aux air regulator & control pressure regulator (K-Jet f/inj)
\- red/yel- main & transfer fuel pumps
15- wht-wht/grn- rear window heater and heated mirror glass
16- blk/red- brake lights pin 54
18- grn/red- rear light bulb

G
1 - blk/yel- Electric mirror adjustment switch pin 5 & electric window relay pin 6/86
2 - blk - heated washer jets, spare plug behind fusebox & idle stabilser valve pin 2/15
3 - blk/yel- heated seat control units pin 17/15
9 - gry/grn- headlight washer relay pin 5/56
10- grn/red- headlight washer relay pin 4/5

H
1 - red/wht- radiator fan thermoswitch & A/C refrig. high pressure switch
2 - red/blk- A/C switch
3 - red - Battery +ve
4 - grn/yel- A/C thermostat
5 - yel/red- fresh air fan switch pin 4
6 - blk - fresh air fan

K
5 - brn/red- ignition switch pin S or SU (difficult to make out!)

L
1 - blk/yel- fusebox pin A/25
2 - brn/blk- fusebox pin B/25
3 - brn - earth location 16 or 81
4 - brn/blu- horn switch

M

N - red/wht- inlet manifold heater
\- red/blk- f/injection relay pin 86 (K-Jet f/inj)

P - red - battery +, ignition switch pin 30, electric window relay pin 87, headlight washer relay pin B/30 & f/injection relay pin 30 (K-Jet f/inj)

R
1 - blk - fusebox pin D/2 (digifant f/inj)
2 - blk/yel- digifant ECU pin 14 & fuel injectors (digifant f/inj)