A faulty transmission control module (TCM) most often causes limp mode with the gearbox stuck in one gear, harsh jolts when you select D or R, erratic gear changes, flashing PRND letters and a gearbox or engine warning light. However, the same symptoms are often caused by a low gearbox oil level, a weak battery, a poor earth or a faulty sensor. To test a transmission control module, start by checking the battery and reading the fault codes with a diagnostic tool that can talk to the gearbox control unit, then check the power supply, the connector, the oil and the live data. Below we explain the symptoms, the diagnostic steps and what the most common fault codes mean.
Fuse Box with Body Control Module BCM Ford Transit Mk7 Siemens VDO 8C1T-14A073-CB 5WK48948L
Vendors's code: 8C1T14A073CB
Product code: 5WK8948L
Barcode:
Code 39:
ISBN:
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BCM fuse box 8C1T-14A073-CB – does it fit your Transit?
This is a used, working fuse box with body control module (BCM) made by Siemens VDO, Ford number 8C1T-14A073-CB, Siemens VDO number 5WK4 8948L. It comes from a Ford Transit (Mk7), 2006–2011. Before buying, compare the number with the label on the part in your vehicle.
Fuse Box with BCM Ford Transit Siemens VDO 8C1T-14A073-CB
This fuse box has an integrated body electronics module (BCM). It controls the central locking, alarm, immobiliser and key functions, lighting and wipers, among other things. This part comes from a Ford Transit (Mk7) built in 2006–2011.
Part numbers to compare
- 8C1T14A073CB – Ford number, on the label: 8C1T-14A073-CB
- 5WK48948L – Siemens VDO number, on the label: 5WK4 8948L
You will find the numbers on the label on the fuse box housing. The most important one is the Ford number 8C1T-14A073-CB – compare it, including the letter suffix, with the label on the part removed from your vehicle.
Symptoms of a faulty BCM
When the body control module in the fuse box starts to fail, the most common symptoms are:
- central locking, remote or alarm not working,
- key not recognised or the engine will not start,
- lighting or wipers not working,
- no communication with the module during diagnostics.
Before replacing it, read the fault codes with a diagnostic tool and check the fuses, power supply, earth connection and connectors – a damaged wiring harness or corroded contacts cause similar symptoms. After replacement, the module must be coded or the data must be cloned from the original module.
Frequently asked questions
| Which vehicle does the fuse box 8C1T-14A073-CB fit? |
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| This part comes from a Ford Transit (Mk7), 2006–2011. Match it by the Ford number 8C1T-14A073-CB – compare it with the label on the part in your vehicle. |
| Which number is the Ford number and which is the Siemens VDO number? |
| 8C1T-14A073-CB is the Ford number, and 5WK4 8948L (written without spaces: 5WK48948L) is the Siemens VDO manufacturer number. |
| Does the module need coding after fitting? |
| Yes, after replacement the module must be coded or the data must be cloned from the original module. |
| What condition is this part in? |
| It is a used part in good working condition. The warranty period is shown in the product specification table. |
Not sure whether this fuse box fits your Transit? Send us a photo of the label on your old part and we will check compatibility.